Trump and Clinton are both closer to their parties' nominations after five primary contests Tuesday, while Sanders faces a very uphill climb.
But will the Democratic front-runner's newfound progressive stance on economic issues win over Sanders' supporters for the general election?
The grand ambitions of Bernie Sanders' campaign have shrunk over the course of the race.
Despite attack ads and millions of dollars spent against him, the GOP front-runner won five states Tuesday — by large margins.
Donald Trump, Hillary Clinton and Bernie Sanders are set to address supporters as results come in for Tuesday night's primaries.
In U.S. towns where manufacturing has vanished, voters are more likely to pick the far-right or far-left candidate, researchers found.
Tuesday’s votes in the so-called Acela primaries could help the leading candidates widen their delegate count against rival contenders.
The "Full Frontal" host poked fun at the prospect of two Republicans teaming up to block Donald Trump from securing the GOP nomination.
The GOP front-runner will kick off policy speeches Wednesday in which he will address a variety of foreign policy issues.
The Republican won all of Tuesday's GOP primaries, while the Democrat captured four races to Bernie Sanders' one. Check here for updates.
Democratic U.S. presidential candidates Hillary Clinton and Bernie Sanders will take the stage a day before voters in five Eastern states head to the polls.
Sheldon Adelson and Foster Friess can live with Donald Trump as the GOP nominee, but Charles Koch isn't so sure.
Oklahoma Gov. Mary Fallin and Donald Trump share similar views on a number of topics.
Donald Trump has a narrow path to becoming the nominee at the GOP convention. Ted Cruz and John Kasich have no mathematical chance of doing so.
Nearly three-fourths of young people surveyed by Harvard said they viewed GOP candidate Donald Trump unfavorably.
Both Hillary Clinton and Donald Trump are eyeing big victories in Pennsylvania and other states Tuesday to pick up more delegates.
The two GOP candidates said they would cede certain states to each other to prevent Trump from getting enough delegates to win.
Both candidates recently clinched primary victories in New York.
The Democrat could be preferable for the White House than the current crop of Republican candidates, the billionaire conservative said.
The Clinton camp chose not to respond to Trump's charge that the former secretary of state is "a crooked person."
The mobile storytelling app filed an amicus brief Friday arguing against a ban on taking photos in voting booths.
Groups are lobbying Hillary Clinton to choose a Hispanic running mate, but the one cited most often is opposed by liberals who say he favors Wall Street.