The coming Democratic primary is sure to be divisive

Why? Past history-- every contested primary since at least 1992 has been (well 2000 was somewhat milder-- Bill Bradley did not get much traction). On DU, just look at the attacks in 2004, 2008, 2016 and continuing sniping about Bernie Sanders even now two years later. The second reason is the sheer number of expected candidates will create a huge division among Democratic voters about whom to choose. It's not going to be a picnic, as the inevitable attacks begin, bolstered by outside forces interested in sowing division.

What needs to happen? Democratic voters need to hold their tribalistic urges in check, so that later there can be a unified front against Trump no matter who the eventual nominee. Everyone should begin the what if game right now with each of the candidates running (as they declare). What if so an so actually wins the nomination? How will I feel and what will I do to help him or her win?