The state agencies who primarily administer those things along with a congress and president who will hold their feet to the fire over it!
Can't lay this one on Congress, my brother. It's the President who enforces the laws, and only the President.
If this law already exists, which it does (Clinton signed it), Trump doesn't need to "call for" anything. All he needs do is direct the agencies he is responsible for to enforce the law. 30 seconds on the phone, tops. Of course, doing that means taking responsibility with no one else to blame.