John Kasich

As the world grappled with a new wave of attacks in Europe, Donald Trump and Hillary Clinton traded wins with their chief rivals on Tuesday in primary contests across three Western states.

Donald Trump and Hillary Clinton traded wins with their chief rivals on Tuesday in primary contests across three Western states.

He's the wild card whose previous comments about Israel have created some anxiety among many who will attend the American Israel Public Affairs Committee policy conference this week in Washington.

Donald Trump's campaign for all of Arizona's Republican delegates is centered on the hard line against illegal immigration that he's taken from the start, and it's a message his supporters lapped up in a series of tense weekend gatherings leading into Tuesday's presidential primaries in the border state.

Protesters clashed with supporters of Donald Trump after he gave a speech in Utah on Friday, ending a day full of presidential candidate appearances that also saw Mitt Romney intensifying his criticism of the GOP front-runner.

The day after high-stakes contests in five states, the math and momentum point to a Donald Trump Republican presidential nomination as GOP officials grapple with whether to embrace the billionaire businessman or rally behind a longshot alternative.

Tuesday's primaries could provide a defining moment in the race for the Republican nomination for president — or not.

GOP front-runner Donald Trump tried to prove over the weekend that no perceived misstep can derail his march to the Republican presidential nomination.

New Jersey's June primary is usually irrelevant, but this year it could decide whether Donald Trump gets the delegates needed for the presidential nomination.

In a Republican presidential primary filled with extraordinary moments, a 24-hour stretch that began Friday night stands above them all.