Following the release of the recording, Democrats and a few Republicans heaped scorn on the outgoing president, who fired off a tweetstorm of unsubstantiated claims of fraud in the November 3 election, AFP wrote.
The taped conversation between Trump and fellow Republican Brad Raffensperger, first obtained by The Washington Post, includes vague threats by Trump that Raffensperger and another official could face "a big risk" if they failed to take moves toward overturning Biden's victory.
"There's nothing wrong with saying, you know, um, that you've recalculated" the vote tally, Trump is heard saying on the tape. "You're off by hundreds of thousands of votes."
Raffensperger is heard responding: "Well, Mr. President, the challenge that you have is, the data you have is wrong."
Biden won the long Republican-leaning state by fewer than 12,000 votes – a narrow margin, but one that has remained unchanged through a series of recounts and audits.
"The current margin is only 11,779. Brad, I think you agree with that, right?" Trump says. "So look. All I want to do is this. I just want to find 11,780 votes."
Making Trump's call more surprising is the fact that even a hypothetical reversal in Georgia, which has 16 Electoral College votes, would not overturn victory by Biden, who won by a margin of 306 to 232.
Ahead of the release of the audio, Trump tweeted about the call, saying that Raffensperger "was unwilling, or unable, to answer questions such as the 'ballots under table' scam, ballot destruction, out of state 'voters', dead voters, and more."
Raffensperger tweeted back, also ahead of the release of the audio, saying: "Respectfully, President Trump: What you're saying is not true. The truth will come out."
Democrats reacted furiously. Vice President-elect Kamala Harris slammed it as "the voice of desperation" and a "bald-faced, bold abuse of power by the President of the United States" during a rally in Savannah, Georgia.
One moderate Republican, Congressman Adam Kinzinger, tweeted: "This is absolutely appalling. To every member of Congress considering objecting to the election results, you cannot – in light of this – do so with a clean conscience."
News of the Trump tape came hours after the US Congress opened its new session Sunday.
Congress will convene in a rare joint session on Wednesday to certify Biden's election result – but it will not be the usual dry pro forma affair.
So far, 12 Republican senators loyal to Trump have announced plans to block certification, instead demanding the formation of a special commission to do an "emergency" election audit.
With Democrats controlling the House and many Senate Republicans expected to confirm Biden's victory, the rebel effort is all but certain to fail.
It has also underscored a sharp divide within the president's party, as Senate Republican leader Mitch McConnell has asked his caucus to respect the Electoral College result.
Senator Mitt Romney, the party's 2012 presidential candidate, called the campaign an "egregious ploy" that served only to "enhance the political ambition of some."