Bernie Sanders is doing the right thing and he played this right the whole time. He got the compromise he wanted from Hilary Clinton and is ready to endorse. Sanders understand you can't just treat the political process like you're favorite sports team, the stakes are two high (especially this year) to play the old my favorite guy didn't get it so i'll vote for the other guy or not at all.
*Mini one sentence rant*
People who where on their "if Sanders doesn't get the nomination i'll vote for Trump(or not vote)" tip where never really Sanders supporters or respected him or his policies.
So you prefer people put their support behind someone they don't like all for the sake of the other guy not getting in office? Makes perfect sense.
A conservative SCOTUS would have the power to undermine every single progressive policy.
One third of the Federal government can be locked I to being progressive for the next couple decades. Makes perfect sense why a former Bernie supporter that isn't fond of Hillary would still be running to vote for her.
-And to that, if Trump wins and the GOP keeps the Senate, they might have e a chance at a super majority in 2018.