"I'm thinking about setting up a commission, perhaps headed by Rudy Giuliani, to take a very serious look at this problem. But this is a worldwide problem. And we have to be smart," Trump told Fox News.
Giuliani, who was New York's Mayor from 1994 to 2001, has called Trump's idea of a Muslim ban unconstitutional. He said that a ban on Muslims would violate the Constitution and there can be no religious test on who is allowed into the country.
Trump did not elaborate on the proposal whether this would happen if he wins the US presidential race or during his campaign.
Trump's call to deny entry to foreign Muslims until America's security has been assured is a centerpiece of his presidential campaign.
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In the interview, Trump reaffirmed he would ban entry of Muslims - albeit temporarily- into the US if he is voted to power.
"Well, we have a ban. There are obviously some very bad things going on. And we're going to figure out what's going on and we're going to be very, very careful. We are allowing Syrians to come in here. We have no idea who they are, we have no paperwork. There's no documentation. They're pouring into the country, our country by the thousands," he said.
Trump said it would be a temporary ban and went on to criticise President Barack Obama for not using the term "radical Islamic terrorism" after the attacks in France and California last year.
"We have a president that won't even use the term radical Islamic terrorism. He won't even use the term," he said.