Donald Trump on Monday reaffirmed his support for temporarily barring non-American Muslims from entering the U.S. during a counterterrorism and national security speech in New Hampshire.

“The only reason the killer was in America in the first place was because we allowed his family to come here,” Trump said of 29-year-old Omar Mateen, who fatally shot 49 people at an Orlando, Fla., nightclub over the weekend.