Biden is surging but his campaign has one weak spot: Joe Biden himself

There is little reason to assume ‘Joementum’ will die off soon – but gaffes have killed his earlier runs and could still kill this one tooSuper Tuesday was a powerful reminder that Twitter is not the real world. Of course, we knew this, or could have known this. Pew Research had shown several times that Democrats on Twitter are more liberal than Democrats overall and that Twitter Democrats are less supportive of Joe Biden and more supportive of Bernie Sanders and Elizabeth Warr