Jeb: Cut Number of Refugees, Focus on Letting in Christians

"I think we need to do thorough screening and take in a limited number", Bush said on CNN's "State of the Union" on Sunday.

Speaking on "Meet the Press" on Sunday, Bush addressed the recent attacks in Paris and said that he believes America has a responsibility to lead in the fight against what he called "this radical Islamist threat".

He reiterated his belief that the U.S.is at war with radical Islam and it's a "clash of civilizations" with a very clear scenario: they win or we do.

And so it was that a significant portion of the debate's terrorism section centered on the question of whether the candidates, particularly Hillary Clinton, have used the appropriately belligerent terminology in discussing terrorism.

CLINTON: I don't think we're at war with Islam.

"These are individuals motivated by their faith". "We need to have a resolve that will bring the world together to root out the kind of radical jihadist ideology that motivates organizations like ISIS - a barbaric, ruthless, violent, jihadist terrorist group". This is not a geopolitical movement.

Former Florida governor and Republican presidential hopeful Jeb Bush spoke up from afar during the debate, tweeting: "Yes, we are at war with radical Islamic terrorism".

Democratic presidential front-runner Hillary Clinton's refusal to use the phrase "radical Islam" in relation to terror attacks is like pretending the United States wasn't fighting the Nazis in World War II, says GOP candidate Sen. Clinton stressed that this can not be an American fight, although American leadership is essential. He didn't say all Muslims.

"Now on the other hand", Cruz added, "Christians who are being targeted, for genocide, for persecution, Christians who are being beheaded or crucified, we should be providing safe haven to them".

Relatively hawkish Clinton, self-described democratic socialist Sanders and low-polling O'Malley took the stage in Des Moines, Iowa for their second Democratic showdown in the 2016 primary cycle.

Carson said the reason why he could reach that conclusion is because he has a "big frontal lobe" that allowed him to think critically.

The Iraq war, he repeated, "was one of the worst foreign policy blunders in the modern history of the United States". Rival Republicans have already held four debates.

Sanders shot back with a blunt message - "Not good enough" - and essentially challenged Clinton to disavow much of her connections to Wall Street millionaires who back her campaign.