A top Democrat on the House Intelligence Committee said the threat of terrorism facing the U.S. does not reside with refugees fleeing Syria, but rather Europeans that travel to the U.S. without a visa.

Appearing on ABC's "This Week" Sunday, Rep. Adam Schiff of California said, "While some have put a lot of focus on the refugees, by and large, the refugees have not been the problem."

Critics of the Obama administration's Syrian refugee resettlement plan, which includes moving up to 10,000 Syrian refugees to the U.S. in the current fiscal year, have said that it poses a security breach through which terrorists might enter the country.

"The real vulnerability here is people with European passports," said Schiff. "European citizens that can travel without a visa to the United States. And we're going to have to address that issue."

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