Watch: George Clooney praises 'selfless' Joe Biden

George Clooney has praised Joe Biden's decision to quit the presidential race as the most selfless thing a president has done since George Washington.

The actor, who is one of the Democratic Party's leading fundraisers, had previously urged Mr Biden not to seek re-election in an opinion piece in the New York Times.

He said the president was a shadow of his former self, writing "we are not going to win in November with this president."

Nearly two weeks later, Mr Biden stood aside.

Mr Clooney was answering questions from reporters at the Venice Film Festival, where he was promoting his latest film.