Michael McCaul actually said...
We can assure--and something that was actually corroborated by Director Comey, by the director of the National Counter-Terrorism Center, by the director of national intelligence, that the vetting process that we undertake is the highest level of scrutiny that any traveler to the United States receives.
Context
McCaul emphasizes the thorough vetting process for travelers to the U.S.
09/13/2016