 Joe Bidens campaign and his Democratic Party are feeling an emotion they have not sensed in quite some time, and one that prompts more than a little fear: confidence. Poll after poll has placed the presumptive Democratic nominee ahead of President Donald Trump, with comfortable national leads that in some cases have swollen to double digits. He is ahead by narrower but consistent margins in battleground states, and Biden himself has grown increasingly bullish on the idea that Democrats will win back the Senate majority, a possibility not even dreamed of until recently. Once an anemic fundraiser, he is now routinely drawing multimillion-dollar hauls. Trump is presiding over a Depression-style economy, a global pandemic and boiling social unrest. His administration has lost several high-profile Supreme Court cases, his former National Security advisers new book has painted a damning portrait, and he is now in perhaps the weakest position of his presidency with less than five months before the general election. The images of a half-empty arena for Trumps much-hyped rally in Tulsa, Okla., on Saturday underscored the perception of a diminished incumbent, one who has long seen crowd size as a barometer of success. But for Democrats, the very idea that they are doing well provokes an underlying skittishness. They worry about voting during the coronavirus crisis, amid restrictions that could make it harder to cast ballots. Some fear a coming misinformation campaign and say the party risks underestimating Trumps ability to turn the country against their nominee. They also worry their party still does not fully understand what led voters to Trump in the first place, and they are terrified that overconfidence, like some of them had four years ago, will lead to complacency. It feels like 2016 all over, said Andrew... 