Domenico Montanaro

Clinton is the first woman ever to head a major-party ticket in this country. She now has the 2,383 delegate commitments necessary to become the presumptive nominee, according to The Associated Press.

Trump U. was not a "university." The goal was to sell potential "buyers" on escalating packages, up to $35,000. Seminars included showing buyers how to capitalize on the housing crisis.

Donald Trump has reached the magic number of 1,237 delegates, according to The Associated Press, making him the presumptive Republican nominee for president.

Bottom line: It's cheaper. No actual votes will be tallied, and the difference in delegates might only be one or two even if all the votes were counted and Sanders won.

Polling shows a tightening race between Donald Trump and Hillary Clinton in head-to-head matchups. Bernie Sanders shows more strength against Trump in such polls, but there are important caveats.

Voters went to the polls in Kentucky and Oregon on Tuesday. Hillary Clinton may have just barely edged out Bernie Sanders in Kentucky's primary. But Sanders won by a significant margin in Oregon.

Voters in West Virginia and Nebraska are heading to the polls Tuesday in the presidential primary contests.

According to NPR's general-election ratings, Clinton starts with a big advantage over Trump based on history and demography. But we also find at least two paths for him to win — and two ties.

Trump's former 2016 presidential rivals Jeb Bush and Lindsey Graham both said Friday they cannot support their party's de facto White House nominee.

"We are suspending our campaign," the Texas senator told supporters at an Indianapolis rally. "But hear me now — I am not suspending our fight for liberty." His announcement ends a vitriolic week.

The Ohio governor has suspended his presidential campaign, leaving Donald Trump as the last man standing. Kasich won one state — his home state — and trails far behind in the delegate count.

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.

The Texas senator hopes the endorsement will give him a boost in the critical Indiana primary on Tuesday. But that could be undercut by Pence's kind words for Trump.

After winning key Northeastern primaries, presidential candidates Hillary Clinton and Donald Trump are pivoting to the general election.

The New York billionaire's speech was short on specifics, but was more subdued and serious than often seen on the campaign trail, a sign of Trump's attempt to project a presidential tone.

On the Democratic side, it's all but done. The former secretary of state now has 90 percent of the delegates needed to be the nominee. For the GOP, Trump is now the only one who can win a majority.

Hillary Clinton and Donald Trump could take major steps toward becoming their parties nominees with big days in the pivotal primaries in the Northeast.

Most people assume that delegates to the GOP convention are bound, at least at first, to a candidate. The convention starts by rewriting the rules, so things could be done differently this year.

Rides on Air Force One and state dinners were lures the last time there was an open convention. What about cold, hard cash? Top Republican lawyer Ben Ginsberg explains what's permissible and not.

The NPR Politics Podcast talks with elections law attorney Ben Ginsberg about how a contested GOP contention would play out.