Trump: U.S. May Have to Do ‘Unthinkable’ in Light of Paris Attacks

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Donald Trump said that U.S. may need to take extreme measures to keep the country safe after Friday’s Paris attacks, including possibly requiring Muslims to have national ID cards or be registered in a database.

In an interview with Yahoo News, Trump was asked about how he would want to increase surveillance on American Muslims.

“We’re going to have to do things that we never did before,” he said. “And some people are going to be upset about it, but I think that now everybody is feeling that security is going to rule. And certain things will be done that we never thought would happen in this country in terms of information and learning about the enemy. And so we’re going to have to do certain things that were frankly unthinkable a year ago.”

Yahoo asked specifically if Trump would require registering Muslims in a database or giving them identification cards. The business mogul dodged, but did not rule them out.

“We’re going to have to look at a lot of things very closely,” he responded. “We’re going to have to look at the mosques. We’re going to have to look very, very carefully.”

Trump said earlier in the week that he would consider shutting down mosques that support extremism.

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Write to Tessa Berenson at tessa.Rogers@time.com