Trump delights crowd with comical Biden impression as he attacks Kamala's record in 'Communist San Francisco'

Donald Trump has mocked Joe Biden's golf swing, speaking style, and walk almost a week after he dropped out of the presidential race.

The former president eventually turned his attention to his new opponent Kamala Harris at a rally in key swing state Minnesota on Saturday night.

Trump revved up the 8,000-strong crowd in St Cloud with his impressions of the president, and called Harris 'Marxist' and 'evil' for her immigration record.

'I don't wanna waste a lot of time because it's over now, right, he's gone, I told you he would be, I told you he wasn't going to make it,' he said of Biden.

But instead he spent huge chunks of his more than an hour-long speech attacking Biden, despite no longer running against him.

Trump referenced his and Biden's bizarre bickering about their golf handicaps during the debate, and claimed the president challenged him to a game.

'Joe Biden, I watched him - I was always a good athlete but I don't wanna brag - Joe Biden challenged me to a round of golf,' he claimed.

Trump then stepped away from the lectern and mimed a series of terrible swings to mock Biden's golf ability.

The former president claimed he offered Biden $1 million if he could score less than 100 on a round of golf, and that Biden turned him down.

'He said he was a six (handicap) right, during the debate, and then immediately he said he was an eight, I said 'that was quick, we keep going like this he'll be a 30 in about two minutes',' he said.

Trump also made fun of Biden's gingerly walks from stage, slow shuffles down stairs, and one time when he went to the wrong side of a stage to the stairs.

He complained his frequent mockery of Biden was taken out of context as someone told him they heard he couldn't find the stairs at a rally.

'I was playing and having fun imitating Joe Biden not being able to find the stairs, and they said that Trump couldn't find the stairs off the stage,' he said.

'Tonight I'll have a very bad night, I haven't done that little routine in a long time because of that.

'I can find the stairs, I'll let you know when it's my time not to find the stairs... I'll say it's time to go, nobody's going to have to tell me.'