Democrats worried about President Joe Biden's ability to win this November are making a renewed push for him to reconsider his reelection bid, using mountains of data, frank conversations and now, his own time off the campaign trail after testing positive for COVID, to encourage a reassessment. Biden has insisted he is not backing down, adamant that he is the candidate who beat Republican Donald Trump before and will do it again this year. But publicly and privately, key Democrats are sending signals of concern, and some hope he will assess the trajectory of the race and his legacy during this few days' pause. Over the past week, Senate Majority Leader Chuck Schumer and House Democratic Leader Hakeem Jeffries have spoken privately to the president, candidly laying out the views of Democrats on Capitol Hill, including their concerns. Separately, the chair of the Democratic Congressional Campaign Committee, Rep. Suzan DelBene of Washington, spoke with the president last week armed wit