"It's a nuisance, it's a distraction, because he can't win the nomination and every dollar that he spends and every time she has to defend against an attack or answer some accusation of his..."

"... is money and time not spent defining Donald Trump and the Republican nominee. That's all it is at this point. I think people gave him a wide berth when he had a numeric chance but there is no math that ends up with his being the nominee, so at this point I think even the wins don't do anything but continue the inevitable problem of he can't get there from here."

Said Joe Trippi, disrespecting Bernie Sanders and all he has done. And it's simply not true that "there is no math." If Sanders keeps winning, it's possible for him to get ahead of Clinton in the non-super delegates. If that happens, the super delegates could flip.

ADDED: With all the help she had, all the money, all the name-recognition, what Sanders has done is truly astounding. If he overtakes her in the democratic process, how can the supers not respond. He'll only need half of them to win. In a year of unlikely occurrences, that seems almost ordinary.

AND: From John Cassidy in The New Yorker:

In the weeks ahead, the calls for Sanders to wrap up his campaign are likely to become more explicit. He seems certain to ignore them, and he has at least four reasons to do so. First, most of his supporters want him to keep going. Second, he still has a (very) slim chance of obtaining the nomination. Third, there isn’t much evidence that his dropping out would affect the result in November. And fourth, back in 2008, Clinton herself did something very similar to what Sanders is doing now, extending her primary contest with Barack Obama well beyond the point at which most commentators had concluded that she had no chance of winning....

Since the primary season began, Sanders has won more than nine million votes and finished ahead of Clinton in eighteen states. (Clinton has won more than twelve million votes and won twenty-three states.) Sanders continues to attract large crowds—on Thursday he will be campaigning in West Virginia—and he seems likely to win more primaries in the coming weeks, including in West Virginia, on May 10th, and Oregon, on May 17th. If he were to end his campaign now, many of his supporters would be furious, and even some Democrats who aren’t necessarily backing him would be disappointed. According to new poll from NBC News/Survey Monkey, fifty-seven per cent of Democrats and Democratic-leaners want Sanders to campaign until the Convention, and just sixteen per cent think he should drop out now. Eighty-nine per cent of Sanders’s supporters said they wanted him to keep going until July. More surprisingly, perhaps, twenty-eight per cent of Clinton’s supporters agreed....