A senior aide to Donald Trump's campaign claimed Sunday that "uncontrolled migration" has put 500,000 U.S. girls at risk of genital mutilation.

Stephen Miller, a senior policy adviser to Trump's GOP presidential campaign and a former top aide to Alabama Sen. Jeff Sessions, made the claim on CNN's "State of the Union" Sunday.

"You want to talk about women's issues? Here's something we should be talking about. It is a fact: As a result of uncontrolled migration into this country -- you can look this up, it's a statistic from Equality Now -- half a million U.S. girls in this country are at risk of female genital mutilation," Miller said.

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