The nation's homeland security chief today denounced some of the 2016 presidential campaign's rhetoric as "overly simplistic" and "counter to our national security interest."

Speaking at a symposium in Washington, D.C., focused on countering violent extremism, Homeland Security Secretary Jeh Johnson took aim at recent remarks like those by Donald Trump and Sen. Ted Cruz calling for surveillance of Muslim communities in the United States.

Cruz said in a statement after last month's terrorist attacks in Brussels, Belgium, that "we need to empower law enforcement to patrol and secure Muslim neighborhoods before they become radicalized."

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