The U.S. government recognized Venezuelan opposition candidate Edmundo González as the “president-elect” of the South American country on Tuesday, months after President Nicolas Maduro claimed to have won the July contest.

U.S. Secretary of State Antony Blinken recognized González in a post on X in which he also demanded “respect for the will” of Venezuelan voters.

The Biden administration had previously said González had earned the most votes in the disputed July 28 election, but had fallen short of acknowledging him as president-elect.

Venezuela’s National Electoral Council, which is stacked with Maduro loyalists, had declared Maduro the election winner hours after polls closed. Unlike previous presidential elections, electoral authorities did not provide detailed vote counts.

But the opposition coalition collected tally sheets from 80% of the nation’s electronic voting machines and posted them online. González and opposition leader Maria Corina Machado said the voting records showed the former diplomat won the election with twice as many votes as Maduro.

Earlier Tuesday, Colombia’s President Gustavo Petro, who has friendly relations with Maduro, reversed his support for the July elections, calling the vote a “mistake.”

Petro spoke in an interview with Brazilian news outlet Globo News, which released excerpts online that Petro’s office shared Tuesday on social media. Petro told the news outlet Monday while visiting Brazil for the G20 summit that he initially was in favor of Venezuela holding the elections, but that he later decided that the vote was not “free.”

“I think the elections were a mistake,” Petro said.

His office did not immediately respond to a request for him to elaborate on the reasons for his change of heart.

Venezuela’s next presidential term begins Jan. 10.