The Republican presidential hopeful told Fox News host Sean Hannity that it is a "bad idea" to allow Syrian and Iraqi refugees to enter the U.S. without adequate screening.
At a Thursday rally in New Hampshire, the Republican candidate opted not to oppose a questioner’s assertion that the president is a Muslim.
During the GOP debate, the presidential candidate praised his brother for protecting America from terrorism.
During Wednesday's Republican presidential debate, the candidate raised the issue of guest visas for Mexican immigrants working in agriculture -- a topic others have avoided.
The Republican's claim to have doubled sales while Hewlett-Packard’s CEO is technically true, but the growth was driven by the ill-fated Compaq merger.
Republican candidates might be overhauling their stances on mass incarceration to reflect the views of Americans, who increasingly support the legalization of marijuana.
The second Republican debate, on CNN, almost matched the blockbuster ratings of last month's GOP clash on Fox News Channel.
Chris Christie is embracing nuclear energy -- an industry that has supported his presidential campaign and favorite causes.
Carly Fiorina may have been a newcomer to the prime-time debate, but she quickly rose to become a favorite on the stage.
The high-octane debate was a more aggressive performance than its predecessor on Fox News -- and this time Carly was part of the main event.
Some Republicans debating Wednesday they would trim taxes, others said they would promote education. Donald Trump said his own trade deals provide an admirable economic model.
"America is not a planet," Rubio said, as candidates tackled issues having to do with science, including vaccines and climate change.
Twitter users -- singer John Legend among them -- mocked the Republican candidate's debate statement of support for George W. Bush's record on national security.
Former Hewlett-Packard CEO Carly Fiorina moved up to the main event debate on Wednesday night and was a consensus winner.
The Florida senator's performance last month earned him high scores, but did not give him a boost in the polls.
Former Florida Gov. Jeb Bush said he resisted when Donald Trump pushed for a Florida casino. Trump says he could have succeeded if he had wanted to. Who's telling the truth?
Who would benefit? How much would it cost? The Republican candidate may have to address these and other inquiries during Wednesday's GOP debate.
The GOP front-runner has brushed off every controversy, attack or backlash so far, but will Wednesday night's GOP debate hurt or help?
After a debate performance in which he got fewer questions than most others, Paul wants to make sure his face is seen.
This time around, host CNN has invited 11 candidates to the Ronald Reagan Library in Simi Valley, California, where Carly Fiorina will join the prime-time stage.
Polls ahead of the second GOP debate show neurosurgeon Ben Carson edging up to front-runner Donald Trump.
"You are going to get the greatest services of any veterans in any country," Trump told the crowd in Southern California, as protesters rallied nearby.