A judge in the US state of Georgia has dismissed a sprawling 2020 election interference case against Donald Trump, ending the last effort to prosecute the US president for allegedly attempting to overturn his loss to former President Joe Biden, reports the BBC.

Peter Skandalakis, who took over the case after the initial prosecutor's removal, asked Judge Scott McAfee to dismiss the charges on Wednesday.

Trump's lawyer Steve Sadow praised the decision to end the "political persecution" against the president.

The dismissal concludes the last of four criminal cases leveled against Trump since he first left the White House, only one of which saw trial and resulted in a conviction.

Around five million votes for president were cast in Georgia in 2020, with Biden winning the critical swing state by fewer than 12,000 votes.

Trump and some of his allies refused to accept the result, and the state quickly became a focal point for efforts to overturn the election.

In January 2021, the Washington Post published a recording of Trump speaking to Georgia's Republican Secretary of State Brad Raffensperger.

"I just want to find 11,780 votes, which is one more than we have. Because we won the state," Trump said in the recording.