Liberal Senator James McGrath says "feral Lefties" are going to be empowered under a Biden presidency.

McGrath said the Left have spent the last four-years undermining U.S. President Donald Trump. "They're going to spend the next four-years hunting down, like some Salem sort of witch hunter trial, all those people who supported Trump.

"And more importantly supported the agenda of Trump, which was about cutting taxes, was about cutting red tape and was about standing up for America," McGrath told Sky News host Paul Murray.

McGrath said, "the Left are just the worst bunch of hypocrites you could ever come across". He also said Joe Biden "is going to be a weak president".