Presumptive GOP presidential nominee Donald TrumpDonald TrumpCIA chief threatened to resign over push to install Trump loyalist as deputy: report Azar in departure letter says Capitol riot threatens to 'tarnish' administration's accomplishments Justice Dept. argues Trump should get immunity from rape accuser's lawsuit MORE on Sunday said the U.S. needs to start looking into the use of profiling to stop terrorism.

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"I think profiling is something we're going to have to start thinking about as a country," Trump said on CBS's "Face The Nation."

The candidate said he doesn't like the concept, but it may be necessary.

"Other countries do it. You look at Israel and you look at others, and they do it and they do it successfully," he said.

"I hate the concept of profiling, but we have to start using common sense and we have to use, you know, we have to use our heads. ... We really have to look at profiling. We have to look at is seriously."

Earlier in the interview, Trump avoided directly answering a question about whether a Muslim buying ammunition and weapons should get extra scrutiny.

"I don't know about that," he said.

"I think, right now, we have some pretty big problems, and they're problems coming out of radical Islamic groups. You know, radical Islamic groups. You have a very, very strong group of people that is radical Islamic and that seems to be a problem."

— This report was updated at 10:58 a.m.