The caucus could be a turning point for candidates in the race who need a boost, or it could be the moment they choose to end their campaigns.
A complaint filed in Iowa by a former Trump staffer says the campaign fired her but not men and paid her less.
Republicans Donald Trump and Ted Cruz, locked in a tight race in Iowa, urged their supporters to give them the first victory of the 2016 campaign.
Under the terms of a recent deal, China has committed to purchase $5.3 billion worth of soybeans from Iowa farmers in a single marketing year.
Wintry weather Monday evening is likely to raise concerns among some presidential candidates about voter turnout.
Trump company employees are helping his campaign and keeping costs down, but ethics experts have questions.
The U.S. senator from Florida commanded the stage at Thursday's GOP debate with powerful rhetoric about how to defeat extremist groups.
During the final GOP debate before the Iowa caucuses, Sens. Marco Rubio and Ted Cruz took one another to task.
GOP front-runner Donald Trump was noticeably absent, but the debate still had its moments.
The "Kelly File" host was quick to push back at the GOP candidates' responses.
The Republican front-runner kicked off his Iowa event Thursday night by saying Fox asked him to reconsider his decision to boycott its debate.
Ben Carson said Thursday while he might not have politics on his resume, he has a proven record handling difficult situations.
The GOP presidential hopefuls took the stage Thursday for the final time before Monday's Iowa caucuses.
The former Hewlett-Packard CEO touted her budget plan during Thursday's "undercard" Republican debate.
The Republican front-runner, feuding with Fox, planned a rally for U.S. military veterans to counter Thursday's GOP debate.
Roger Ailes defended the anchorwoman Tuesday after Republican front-runner Donald Trump said he would skip Thursday's GOP debate.
A Tuesday poll shows Donald Trump and Ted Cruz battling it out in Iowa — both seem resilient in the Midwest state.
The Republican candidate asked supporters at an Iowa rally if a protester was wearing "one of those hats."
The former Florida governor and GOP presidential candidate said he knows he has to "earn" the support of former President George W. Bush.
The Texas senator isn't pulling punches as he tries to take down the New York real estate mogul.
New polls and state primary laws could mean Sanders takes independent voters who may have voted for one of Donald Trump’s many competitors.
Sarah Palin has stumped for many candidates in recent elections with only marginal success.