The hidden factors that could produce a surprise Trump victory

 https://www.politico.com/news/2020/10/19/trump-victory-democrats-election-430013

By almost every measure that political operatives, academics and handicappers use to forecast elections, the likely outcome is that Joe Biden will win the White House.

Yet two weeks before Election Day, the unfolding reality of 2020 is that it’s harder than ever to be sure. And Democrats are scrambling to account for the hidden variables that could still sink their nominee — or what you might call the known unknowns.