The bridge building probably can’t really start until Clinton clinches the nomination, but if she doesn’t succeed in reconciling with a majority of Sanders voters (the Bernie-or-Trump crowd is unreachable anyway) then we’re definitely going to be watching Trump being inaugurated next January.

The Hidden Importance Of The Sanders Voter • 2016 May 19 • Nate Silver • FiveThirtyEight

In other words, even if Clinton is the nominee, the only person standing in the way of a Trump presidency is Sanders. If he refuses to make peace with the Clinton camp or even if he does but fails to bring enough of his followers with him, we’re fucking doomed.