George Clooney has said it was a 'mistake' for Kamala Harris to replace Joe Biden as the Democratic candidate to face Donald Trump in the US presidential election last November.

But the actor added that he had no regrets about writing an op-ed in the New York Times that July calling for Biden to quit the race. In the piece, titled 'I Love Joe Biden. But We Need a New Nominee', Clooney wrote that the ageing president had won many battles in his career 'but the one battle he cannot win is the fight against time'.

Clooney's comments come after the former president's son, Hunter Biden, lashed out at him for questioning his father's mental sharpness. Less than a fortnight after Clooney's op-ed, Biden announced he would step aside for Harris.

In his interview with CBS, the actor said that he would write it again, adding: 'We had a chance.' 'I wanted there to be, as I wrote in the op-ed, a primary. Let's battle-test this quickly and get it up and going,' he said. However, there was no Democratic primary and Biden's vice-president took the nomination, going on to lose against Trump.

Clooney elaborated that the mistake with Kamala was she had to run against her own record, making it difficult to position herself as a fresh candidate. He felt it was a tough task and reiterated that it was a mistake.

In the op-ed, he expressed that it was 'devastating to say it' but noted that the Joe Biden he met recently was not the same as the Biden of 2010 or even 2020. He pointed to Biden's performance in a debate against Trump as a concerning sign of his fitness for office.

Hunter Biden responded to Clooney's remarks with expletives during a YouTube interview, implying that the actor had no right to comment on his father's campaign decisions.

In related news, Vice President Harris mentioned the possibility of running for president in the future, confident that a woman will hold the office one day.