Just got this from the Bernie campaign
But it seems like good solid advice. 
Dear Joanie Baloney,
Make no mistake, Trump will be a formidable candidate in the general election. We predicted that he would win the Republican nomination the night of the first Republican debate, when all the foolish pundits were dismissively writing him off. He plays to the worst side of people, and we have LOTS of people in our country with bad sides.
And to beat him, whoever the Democrats end up nominating will need the support of all supporters of either Democratic candidate now.
On our side there are many sincere people who frankly like Bernie Sanders better than Hillary Clinton, among our own participants by about a 4.5 to 1 margin in both the online polls we did. And there are LOTS of women in particular who like Sanders better on his policy positions, NOT because of his gender.
If you are a Clinton supporter, we respect that you like her better.
And you need to respect that some of the rest of us prefer Sanders.
You cannot win by going to war with or blowing off your fellow progressives and liberals. Because while Republican candidates may attack each other, Republican voters are NOT. They will be energized and united in November. And they will mop the floor with you unless you have each and every one of us with you.
It is your job, if you support Clinton, to do everything you can to rally people to come out and vote for your candidate. Don't accuse us of "weakening" Clinton because Sanders is a strong candidate. Because if you cannot handle Sanders now, what WILL you do against the king of all modern demagogues, Donald J. Trump, a man who oozes inflammatory innuendo from every pore.
We'll make a commitment to you right now. We will support whoever the Democrats nominate. Not just the Supreme Court but the entire federal judiciary hangs in the balance, lest we end up a new crop of reactionary judges of the opinion that torture and carpet bombing are as American as apple pie.
In fact, to show you what good sports we are, if there are enough people who would like to see us do a Clinton bumper sticker, why don't you email us with your suggestions right now.
In the meantime we will continue to offer the very popular Bernie bumper stickers, where we have already distributed over 15,000, presuming our Bernie fans want to do everything they could have done to support him.
-JB
