Bernie needs better messaging than this. Just saying that it's not the time for a protest vote won't change anything because it allows his supporters to look into that statement and falsely equivocate that Bernie really is saying Clinton is bad but Trump is worse. He needs to speak positively of Clinton and sell her as a real progressive; which is a hard sell for his supporters after he did the opposite during the primaries.
Agreed, he hasn't been doing nearly enough to ensure that orange turbo-Bush doesn't destroy everything he's worked for over the next four years.