http://krugman.blogs.nytimes.com/2016/04/01/feel-the-math/
The Sanders campaign has come much further than almost anyone expected, to the point where Sanders can have a lot of influence on the shape of the race. But with influence comes responsibility, and its time to lay out some guidelines for good and bad behavior.
The first thing to say is that its still very unlikely that Sanders can win the nomination. Dont tell me about national polls (and cherry-pick the polls that show your guy getting close); at this point its all about delegate counts, where Clinton has a substantial lead with the voting more than half over. The Timess Upshot has a nice calculator that takes account of what we know about demographic factors Sanders does well in very white states and in caucuses, not so much elsewhere and lets you experiment with various overall leads in what remains of the race. To overtake Clinton in pledged delegates, Sanders would need to win by about a 13 point margin from here on in:
So what does that say about appropriate behavior on the part of her rival? Two things, Id argue.
First, the Sanders campaign needs to stop feeding the right-wing disinformation machine. Engaging in innuendo suggesting, without evidence, that Clinton is corrupt is, at this point, basically campaigning on behalf of the RNC. If Sanders really believes, as he says, that its all-important to keep the White House out of Republican hands, he should stop all that and tell his staff to stop it too.