Fred Harris, a former U.S. senator from Oklahoma, presidential hopeful and populist who championed Democratic Party reforms in the turbulent 1960s, died Saturday. He was 94.

Harris’ wife, Margaret Elliston, confirmed his death to The Associated Press. He had lived in New Mexico since 1976.

“Fred Harris passed peacefully early this morning of natural causes. He was 94. He was a wonderful and beloved man. His memory is a blessing,” Elliston said in a text message.

Harris served eight years in the Senate, first winning in 1964 to fill a vacancy, and made unsuccessful bid for the presidency in 1976.

“I am deeply saddened to learn of the passing of my longtime friend Fred Harris today,” Democratic New Mexico Gov. Michelle Lujan Grisham wrote in a post to social media. “Harris was a towering presence in politics and in academia, and his work over many decades improved New Mexico and the nation.  He will be greatly missed.”

Democratic Sen. Martin Heinrich of New Mexico said in a statement that “New Mexico and our nation have lost a giant,” describing him as a “tireless champion of civil rights, tribal sovereignty and working families.”

It fell to Harris, as chairman of the Democratic National Committee in 1969 and 1970, to help heal the party’s wounds from the tumultuous national convention in 1968 when protesters and police clashed in Chicago.

He ushered in rule changes that led to more women and minorities as convention delegates and in leadership positions.

“I think it’s worked wonderfully,” Harris recalled in 2004, when he was a delegate to the Democratic National Convention in Boston. “It’s made the selection much more legitimate and democratic.”

“The Democratic Party was not democratic, and many of the delegations were pretty much boss-controlled or -dominated. And in the South, there was terrible discrimination against African Americans,” he said.

Harris ran unsuccessfully for the Democratic presidential nomination in 1976, quitting after poor showings in early contests, including a fourth-place win in New Hampshire. The more moderate Jimmy Carter went on to win the presidency.

Harris moved to New Mexico that year and became a political science professor at the University of New Mexico. He wrote and edited more than a dozen books, mostly on politics and Congress. In 1999 he broadened his writings with a mystery set in Depression-era Oklahoma.

Throughout his political career, Harris was a leading liberal voice for civil rights and anti-poverty programs to help minorities and the disadvantaged. Along with his first wife, LaDonna, a Comanche, he also was active in Native American issues.

“I’ve always called myself a populist or progressive,” Harris said in a 1998 interview. “I’m against concentrated power. I don’t like the power of money in politics. I think we ought to have programs for the middle class and working class.”

“Today ‘populism’ is often a dirty word because of how certain leaders wield power,” Heinrich said in his statement Saturday. “But Fred represented a different brand of populism — one that was never mean or exclusionary. Instead, Fred focused his work and attention on regular people who are often overlooked by the political class.”

Harris was a member of the National Advisory Commission on Civil Disorders, the so-called Kerner Commission, appointed by then-President Lyndon Johnson to investigate the urban riots of the late 1960s.

The commission’s groundbreaking report in 1968 declared, “our nation is moving toward two societies, one black, one white — separate and unequal.”

Thirty years later, Harris co-wrote a report that concluded the commission’s “prophecy has come to pass.”

“The rich are getting richer, the poor are getting poorer and minorities are suffering disproportionately,” said the report by Harris and Lynn A. Curtis, president of the Milton S. Eisenhower Foundation, which continued the work of the commission.

Norman Ornstein of the American Enterprise Institute said Harris rose to prominence in Congress as a “fiery populist.”

“That resonates with people…the notion of the average person against the elite,” Ornstein said. “Fred Harris had a real ability to articulate those concerns, particularly of the downtrodden.”

In 1968, Harris served as co-chairman of the presidential campaign of then-Vice President Hubert Humphrey. He and others pressed Humphrey to use the convention to break with Johnson on the Vietnam War. But Humphrey waited to do so until late in the campaign, and narrowly lost to Republican Richard Nixon.

“That was the worst year of my life, ’68. We had Dr. Martin Luther King killed. We had my Senate seatmate Robert Kennedy killed and then we had this terrible convention,” Harris said in 1996.

“I left the convention — because of the terrible disorders and the way they had been handled and the failure to adopt a new peace platform — really downhearted.”

After assuming the Democratic Party leadership post, Harris appointed commissions that recommended reforms in the procedures for selecting delegates and presidential nominees. While lauding the greater openness and diversity, he said there had been a side effect: “It’s much to the good. But the one result of it is that conventions today are ratifying conventions. So it’s hard to make them interesting.”

“My own thought is they ought to be shortened to a couple of days. But they are still worth having, I think, as a way to adopt a platform, as a kind of pep rally, as a way to get people together in a kind of coalition-building,” he said.

Harris was born Nov. 13, 1930, in a two-room farmhouse near Walters, in southwestern Oklahoma, about 15 miles from the Texas line. The home had no electricity, indoor toilet or running water.

At age 5 he was working on the farm and received 10 cents a day to drive a horse in circles to supply power for a hay bailer.

He worked part-time as a janitor and printer’s assistant to help for his education at University of Oklahoma. He earned a bachelor’s degree in 1952, majoring in political science and history. He received a law degree from the University of Oklahoma in 1954, and then moved to Lawton to practice.

In 1956, he won election to the Oklahoma state Senate and served for eight years. In 1964, he launched his career in national politics in the race to replace Sen. Robert S. Kerr, who died in January 1963.

Harris won the Democratic nomination in a runoff election against J. Howard Edmondson, who left the governorship to fill Kerr’s vacancy until the next election. In the general election, Harris defeated an Oklahoma sports legend — Charles “Bud” Wilkinson, who had coached OU football for 17 years.

Harris won a six-year term in 1966 but left the Senate in 1972 when there were doubts that he, as a left-leaning Democrat, could win reelection.

Harris married his high school sweetheart, LaDonna Vita Crawford, in 1949, and had three children, Kathryn, Byron and Laura. After the couple divorced, Harris married Margaret Elliston in 1983. A complete list of survivors was not immediately available Saturday.

Countries agreed on a deal to inject at least $300 billion annually in humanity’s fight against climate change, aimed at helping poor nations cope with the ravages of global warming at tense United Nations climate talks in the city where industry first tapped oil.

The $300 billion will go to developing countries who need the cash to wean themselves off the coal, oil and gas that causes the globe to overheat, adapt to future warming and pay for the damage caused by climate change’s extreme weather. It’s not near the full amount of $1.3 trillion that developing countries were asking for, but it’s three times the $100 billion a year deal from 2009 that is expiring. Delegations said this deal is headed in the right direction, with hopes that more money flows in the future.

“Everybody is committed to having an agreement,” Fiji delegation chief Biman Prasad said as the deal was being finalized. “They are not necessarily happy about everything, but the bottom line is everybody wants a good agreement.”

It’s also a critical step toward helping countries on the receiving end create more ambitious targets to limit or cut emissions of heat-trapping gases that are due early next year. It’s part of the plan to keep cutting pollution with new targets every five years, which the world agreed to at the U.N. talks in Paris in 2015.

The Paris agreement set the system of regular ratcheting up climate fighting ambition as away to keep warming under 1.5 degrees Celsius above pre-industrial levels. The world is already at 1.3 degrees Celsius and carbon emissions keep rising.

Countries also anticipate that this deal will send signals that help drive funding from other sources, like multilateral development banks and private sources. That was always part of the discussion at these talks — rich countries didn’t think it was realistic to only rely on public funding sources — but poor countries worried that if the money came in loans instead of grants, it would send them sliding further backward into debt that they already struggle with.

“The $300 billion goal is not enough, but is an important down payment toward a safer, more equitable future,” said World Resources Institute President Ani Dasgupta. “This deal gets us off the starting block. Now the race is on to raise much more climate finance from a range of public and private sources, putting the whole financial system to work behind developing countries’ transitions.”

It’s more than the $250 billion that was on the table in the first draft of the text, which outraged many countries and led to a period of frustration and stalling over the final hours of the summit. After an initial proposal of $250 billion a year was soundly rejected, the Azerbaijan presidency brewed up a new rough draft of $300 billion, that was never formally presented, but also dismissed roundly by African nations and small island states, according to messages relayed from inside.

The several different texts adopted early Sunday morning included a vague but not specific reference to last year’s Global Stocktake approved in Dubai. Last year there was a battle about first-of-its-kind language on getting rid of the oil, coal and natural gas, but instead it called for a transition away from fossil fuels. The latest talks only referred to the Dubai deal, but did not explicitly repeat the call for a transition away from fossil fuels.

Countries also agreed on the adoption of Article 6, creating markets to trade carbon pollution rights, an idea that was set up as part of the 2015 Paris Agreement to help nations work together to reduce climate-causing pollution. Part of that was a system of carbon credits, allowing nations to put planet-warming gasses in the air if they offset emissions elsewhere. Supporters said a U.N.-backed market could generate up to an additional $250 billion a year in climate financial aid.

Despite its approval, carbon markets remain a contentious plan because many experts say the new rules adopted don’t prevent misuse, don’t work and give big polluters an excuse to continue spewing emissions.

“What they’ve done essentially is undermine the mandate to try to reach 1.5,” said Tamara Gilbertson, climate justice program coordinator with the Indigenous Environmental Network. Greenpeace’s An Lambrechts, called it a “climate scam” with many loopholes.

With this deal wrapped up as crews dismantle the temporary venue, many have eyes on next year’s climate talks in Belem, Brazil.

The promotion of a three-star general who was part of the 2021 U.S. withdrawal from Afghanistan has been paused by Republican Sen. Markwayne Mullin of Oklahoma, three sources familiar with the move confirmed to CBS News Saturday.

Lt. Gen. Christopher Donahue was slated to be promoted to a four-star rank and take command of the U.S. Army in Europe. However, he was not included in a batch of nearly 1,000 promotions that moved through the Senate Armed Services Committee this week despite receiving a Pentagon recommendation.

Mullin has put a hold on the promotion. The intention is to allow for the new Republican-controlled Congress and President-elect Donald Trump to weigh in on the promotion given Donahue’s involvement in the Afghanistan withdrawal, two sources familiar with the situation told CBS News.

Behind the scenes, there is an effort underway by the Army and other allies to convince Congress to move forward and lift the hold, which appears to be politically motivated, sources said.

During the campaign, Trump frequently mentioned his surprise that no officers were consequently fired by President Biden for the chaotic withdrawal.

Military officers execute U.S. policy but do not create it. It was the Trump administration that in February 2020 brokered the deal with the Taliban to withdraw U.S. forces from Afghanistan, but it was Mr. Biden who decided to execute that withdrawal despite the Taliban breaking the terms of that U.S. agreement.

Donahue was the last U.S. soldier to exit Afghanistan in 2021. The U.S. evacuated about 125,000 people, including 6,000 Americans, over the course of its withdrawal, during which dozens of Afghans and 13 U.S. service members were killed in a suicide bombing outside Hamid Karzai airport in Kabul.

The U.S. underestimated the speed with which the Taliban would capture Kabul and the well-documented U.S. logistical and planning failures have been a focus of multiple internal probes at the Pentagon, State Department, and in Congress.

An extensive State Department report released last year found that “insufficient” planning, communication failures and an inability to grasp “the scale and scope of the operation” contributed to the chaotic operation.

CBS News has reached out to Mullin’s office but did not receive a response. It is not clear whether Trump is aware of the hold.

contributed to this report.

Margaret Brennan

Margaret Brennan is the moderator of CBS News’ “Face the Nation with Margaret Brennan.” Based in Washington, D.C., Brennan is also the Network’s chief foreign affairs correspondent and a contributing correspondent to 60 Minutes.