This is clearly, but eloquently, aimed at Sanders supporters who are reluctant to vote for Hillary Clinton. (Trump supporters will find little here that speaks to them.)
"... we were totally wrong in our assessment of whether it matters if a corporate center liberal is elected over an insecure, unstable, right-wing candidate who does not respect the Constitution."
"... the difference between a president who is not doing enough for progress — even one wedded to the national security state — and one who is using the power of the office actively to reverse progress and mobilize racists, the xenophobic, and the elites against progress is enormous."http://www.vox.com/2016/9/21/12987108/sanders-clinton-nixon-humphrey