The leading Brexiteer made the extraordinary call at the Conservative Political Action Conference (CPAC), an annual meeting of the American right. Mr Farage added Jeremy Corbyn’s Labour Party leadership was a “huge contributory factor to Brexit getting done” and suggested Republicans could learn from Labour’s move to the hard-left.
He said: “You should be backing Bernie Sanders, you should be campaigning for Bernie Sanders, you should be donating money to Bernie Sanders.
“You need a Democrat Party that’s as far left-wing and as anti-American as they possibly can be.”
Bernie Sanders, who describes himself as a democratic socialist, is currently leading the race for the Democratic presidential nomination to challenge Trump.
However he faces a tough challenge over the weekend in South Carolina, which polls suggest could back his rival Joe Biden.
“You need a Democrat Party that’s as far left-wing and as anti-American as they possibly can be” (Image: GETTY)
Donald Trump addressing supporters in South Carolina (Image: GETTY)
Mr Biden served as vice-president under Obama for eight years from 2009 to 2017.
During his address Mr Farage claimed another Trump term could mark the “end of the globalist project”.
He stated: “With four more years of Donald Trump we will complete the job.”
During the 2016 presidential election Mr Farage was an enthusiastic Trump supporter and campaigned for the Republican nominee.
READ MORE: Nigel Farage warns ‘optimistic’ Brexiteers 'it's not over' yet
Nigel Farage at CPAC (Image: GETTY )