The President should order them to go down to the border for a ride-along. After a night of climbing through thorns and sticker bushes and cactus, getting crap thrown at them, and shot at or rocks thrown at them, their eyes might be opened. But if they want to make fun of a black reporter, do it at their own peril.
The president cannot order congress critters to do anything. I wish this president could order congress critters around; especially I wish he could tell them how to vote!