Stuart Varney: Biden's 'threat to democracy' strategy isn't working as planned

During his "My Take" on Thursday, "Varney & Co." host Stuart Varney previewed Thursday's CNN Presidential Debate, arguing President Biden's politicized attacks on former President Trump undermine his "threat to democracy" refrain.STUART VARNEY: The Biden campaign has one overriding theme. Donald Trump is a threat to democracy.That theme will be prominent tonight. We are told that Biden will try to rile Trump up by saying he tried to overturn the 2020 election results. BIDEN, TRUMP FACE