President Trump and former Vice President Joe Biden presented starkly different visions for the country’s recovery from Covid-19 at the final presidential debate Thursday, with Biden warning of a “dark winter” and Trump downplaying the threat of the virus and urging Americans to return to work and to school. In the first segment of the debate, Trump doubled down on his misleading assessment that the U.S. is “rounding the turn” on Covid-19, insisting “it will go away.” … Biden, meanwhile, attacked Trump’s “ineptitude,” urging increased use of masks and adherence to social distancing guidelines.