Republican presidential candidate Donald Trump said he would implement a database to keep track of Muslims in the United States as part of his immigration policy.
Trump, interviewed by NBC News after a campaign appearance in Iowa on Thursday night, was asked how a database tracking Muslims differed from efforts last century to track Jews in Nazi Germany, and said: "You tell me."
His comments come amid renewed security concerns following the Islamic State attacks in Paris last week that killed at least 129 people and U.S. plans to take in 10,000 refugees from Syria.
Other Republican presidential candidates have backed such efforts, including Trump's closest Republican rival in the polls, Ben Carson, who likened Syrian refugees to "rabid dogs" who would put the country at risk.