Party leaders scramble to forestall a parade of prominent Republicans endorsing Clinton.
Elections
Trump lagging at start of general election fight
His campaign aides say they are focused on winning primaries and will rely on help from the party.
Analysis: Cruz and Kasich losing numbers game
A victory for Donald Trump in Indiana next Tuesday could all but put his rivals down for the count.
Trump works to mend fences with GOP
But he still has to overcome concerns about his loyalty to the party and his discipline and electability as a candidate.
Big money in politics: Super-rich donors flood super PAC coffers
Staggering sums from a small core of givers are likened to Gilded Age campaign financing.
Clinton and Sanders set to debate – again
Thursday’s debate – the tenth time the two face off – could be one of the Democrats’ liveliest yet.
Presidential campaigns: Candidates keep riding the wave of popular rage
As George Wallace did, Donald Trump builds his campaign on the anger of the disaffected.
Clinton, Trump extend their delegate leads with victories in Arizona
Voter turnout was high and lines long in Arizona, Utah and Idaho.
Reporter files police report over alleged attack at Trump news conference
Michelle Fields, a reporter for conservative website Breitbart, says Trump’s campaign manager forcibly grabbed and bruised her arm.
Interactive map: Maine’s 2016 Democratic caucus results
While Sen. Bernie Sanders won the majority of votes in most towns, races were more competitive in wealthy coastal communities and rural inland areas of central Maine.