Scott Detrow

Donald Trump and Bernie Sanders won clear, early and decisive victories in the New Hampshire primary Tuesday night.

Trump beat the GOP field by double digits. He got 35 percent of the vote, well ahead of surprise second-place finisher John Kasich, who pulled in 16 percent. Kasich was followed by ...

Embracing his family's famous name, the Republican presidential candidate makes a campaign stop in New Hampshire with his mother, the former first lady. "He's decent and honest," she says.

Florida Sen. Marco Rubio is drawing big crowds in New Hampshire, where he's not just eyeing Donald Trump and Ted Cruz, but also hoping to wrap up after a strong showing in Iowa.

A day after the Iowa caucuses, Republican presidential candidates are flooding New Hampshire hoping to make their mark ahead of next week's primary.

Harry Rubenstein is deep in a thought about a log cabin when he pauses, mid-sentence, and disappears down a corridor.

He returns a moment later brandishing a large wooden axe.

Rubenstein is the chair of the political history division at the Smithsonian Museum of American History, and he's standing in ...

Four days before the Iowa caucuses, Vermont Sen. Bernie Sanders' campaign has released a doctor's letter declaring Sanders "in overall very good health."

The letter, from Dr. Brian Monahan, Congress' attending physician, states that Sanders' last physical was "normal." The exam included a blood pressure exam, cholesterol count and electrocardiogram.

...

A week before the Iowa caucuses, one strategy campaigns are going all in on is texting as a way to communicate with and mobilize supporters.

It's easy to get cynical about the presidential campaign, especially so close to the first round of voting, when many candidates are on the attack.

But see it up close and personal, and the process can feel a bit more charming. That's what a class from Indiana's Manchester University found ...

The onetime Iowa caucus winner now sits dead last in the state's polls, but Rick Santorum says he's still hoping for another last-minute surge.

Four years ago, reporting problems led to a weeks-long delay in declaring a caucus winner. This year, Iowa Republicans and Democrats are updating their tallying technology with help from Microsoft.

Two top aides for Republican presidential candidate Ben Carson have quit the campaign. The retired neurosurgeon has seen his fortunes wane since national security took center stage on the campaign.

With just hours to go before the end of the year, presidential campaigns are blasting supporters with emails in an attempt to boost their fundraising totals for the fourth quarter of 2015.

But one Republican presidential campaign is already eagerly promoting its haul.

On Wednesday night, Texas Sen. Ted ...

Republican presidential candidate Donald Trump recently threw $2 million a week behind television ads to draw support in Iowa, New Hampshire and South Carolina.

Updated at 9:45 p.m. ET

Former New York Gov. George Pataki ended his struggling presidential campaign Tuesday evening.

"While tonight is the end of my journey for the White House, as I suspend my campaign for president, I'm confident we can elect the right person — someone who can bring ...

Data collection and analysis is a central aspect of a modern political campaign. It's just that usually, campaigns don't really talk about it.

But on Saturday night, the very first question in the Democratic presidential debate was all about the voter files that the Democratic National Committee maintains for its ...

Voter files play a central role in both a campaigns day-to-day operations, and their big-picture strategic decisions. The files also are very expensive and time-consuming to put together.

The senator's campaign confirms a member of its staff accessed the proprietary voter files of Clinton's campaign thanks to "incompetence of the vendor." Her campaign is calling it "unacceptable."

A political action committee backing Chris Christie is using mobile check-ins at campaign events for all GOP candidates, gathering data that one strategist calls a "building block" of modern politics.