In the wake of the Paris terror attacks, former Florida Gov. Jeb Bush (R) said Sunday that American aid toward refugees should be geared toward Christians who are fleeing persecution in Syria, as opposed to those who are Muslim.

"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. "There are a lot of Christians in Syria that have no place now. They'll be either executed or imprisoned, either by Assad or by ISIS. We should focus our efforts as it relates to the refugees for the Christians that are being slaughtered."

The White House's plan to take in 10,000 Syrian refugees has come under attack from Republican presidential candidates in the wake of Friday's terror attack in Paris, which claimed at least 129 lives and wounded at least 350. Officials say one of the attackers held a Syrian passport and appears to have come through Greece among the throngs of refugees, increasing fears that ISIS is using the crisis as a way to infiltrate Europe.

Bush said that the U.S. should use a careful screening process to ensure refugees are in fact Christian, saying "we need to be obviously very, very cautious."

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