Don Gonyea

Members of the pro-Israel group AIPAC heard from nearly all of the remaining presidential candidates at their annual policy conference Monday.

Donald Trump spoke at the pro-Israel group's annual conference in Washington, D.C., Tuesday night. Earlier that day, Democrat Hillary Clinton delivered a speech which criticized Trump.

Presidential candidates Hillary Clinton, Donald Trump, John Kasich and Ted Cruz are addressing the pro-Israel group AIPAC's annual policy conference Monday.

For Donald Trump, Tuesday was a night that gets him closer to the nomination. For Ted Cruz and John Kasich, now begins a week-by-week, state-by-state battle to deny him the delegates he needs.

With David Greene in Ohio and Steve Inskeep in Florida, some Democrat voters say Bernie Sanders pushed Hillary Clinton to be a better candidate.

The NPR politics team brings us analysis on the vote in the Ohio and North Carolina primary contests. Polls are also closing in Florida, Missouri and Illinois.

Tuesday's primary contests may be the last real chance for Donald Trump's opponents to seriously harm his march to the GOP presidential nomination.

GOP voters attending campaign events through the weekend were buzzing about the clashes at Trump's cancelled rally in Chicago on Friday.

Another chaotic and tense day, with arrests and pepper spray, played out at Donald Trump rallies. A man jumped a barricade trying to get at Trump, but Trump — and his supporters — were undeterred.

Republican front-runner Donald Trump canceled a Chicago rally Friday night after a series of physical confrontations between protesters and his supporters. He resumed his campaign Saturday in Ohio.

What has happened to the GOP since it was trounced in the last presidential election? Henry Barbour, co-authored of the autopsy report, looks at whether his party paid attention to its conclusions.

Republicans hold contests in four states Tuesday: Idaho, Hawaii, Michigan and Mississippi. Donald Trump is trying to extend his delegate lead, while Ted Cruz looks to pick up momentum after recent wins.

In Michigan, Donald Trump has been steadily leading in the Republican polls. Ted Cruz and John Kasich have been rallying their supporters in hopes of making a stronger than expected showing.

Michigan's presidential primary is on Tuesday. Donald Trump looks to have strong support from the state's white working class voters, but John Kasich is campaigning hard there.

Michigan is a state that has had its share of hard times in recent years. A lot of people voting on Tuesday in that state's primary were hit hard during the recession.

The most recent Republican presidential nominee is taking shots at Donald Trump's fitness to be president.

And he's not mincing his words.

Mitt Romney, the former Massachusetts governor, called the current GOP front-runner "a phony, a fraud" in a speech Thursday morning in Salt Lake City. And he didn't stop ...

The 2012 GOP presidential nominee will give what's billed as a major speech on the current campaign. In Detroit, Ben Carson won't be at the GOP debate, though he has not officially ended his campaign.

Hillary Clinton and Donald Trump had strong Super Tuesday showings, but their rivals didn't let up. Bernie Sanders won 4 states. Ted Cruz captured three. And, Marco Rubio won the Minnesota caucuses.

On the Republican side, Donald Trump is projected to win in Georgia. For the Democrats, Hillary Clinton takes Georgia and Virginia, while Bernie Sanders won in his home state of Vermont.

It's the biggest day of voting in the 2016 primary season. Donald Trump is looking to solidify his path to the GOP nomination, while Ted Cruz and Marco Rubio are looking to knock him off course.