Trailing Hillary Clinton in the delegate race, Bernie Sanders says the Nevada state party treated him unfairly and denied that his supporters incited violence and leveled threats toward officials.
If Donald Trump wins most of Indiana's delegates, his path to the nomination will be clear. Even if Bernie Sanders wins the state, he will likely wake up with less of a chance of being the nominee.
Beyond the prospect of winning the actual nomination, each of these men sees a chance to frame the issues and politics of the general election — and to influence party dynamics for years to come.
Supporters of Bernie Sanders' presidential campaign have been calling, emailing and tweeting so-called superdelegates who back Hillary Clinton, to try to convince them to switch sides.
Hillary Clinton and Donald Trump won big across the board, but Ted Cruz pulled off a surprise in Oklahoma, and Marco Rubio finally won his first state in Minnesota.
An NPR analysis finds one very rosy scenario for Sanders in which he comes out with the majority of pledged delegates. But the possible results range from Sanders plus-1 to Clinton plus-151.
Clinton has about 23 times as many superdelegates as Sanders does, according to a new survey from the AP. And she's picked up far more than Sanders even after his big New Hampshire victory.
Underscoring her level of support among the Democratic establishment, Hillary Clinton has a far bigger lead with Democratic elected officials than in 2007, the last time she ran.