Our current laws suggest border enforcement is required. Trump doesn’t need to do a thing but let Border Patrol interdict the coming invaders and turn them around, with force if necessary. Any who slip into the USA need to be deported back to Central America, not Mexico.
The head of the border against union said they can’t stop them. Then can’t enter mexico and if the invaders step onto us property they are in the hearing process for political asylum. Unless trump wants to shoot, them or block them or see drops across the border they will step onto US soil.