Wow this forum hates Bernie even more then Washington does.
The guy couldn't do it in the south. He couldn't do it in the upper Midwest aside from a fluke in Michigan. His appeal is limited to caucus states, parts of the northeast, and Dixiecrats who always vote R in the general. He has no winning coalition and needs to drop out if he cares about stopping Donald Trump.
Ok David Brock. Unfortunately for you he is not dropping out anytime soon. I don't know how staying in the race is going to hurt the Democrats chances against Trump, all I know is Democratic turnout will probably be super low with Hillary as the nominee. Even though people are voting for Clinton they like Sanders as well. (Not as much hate as this forum)
But what is the point of Sanders staying in when he has no chance of being nominated barring a Hillary indictment or death? The primary is no longer a legitimate contest of ideas, since only one candidate, Clinton, has a chance of winning. All it is doing is making it harder for Hillary to pivot to the center, which will be needed to defeat TRUMP, who is not necessarily a pushover in the general.