It's obvious what's happened.
Donald Trump is seeking approval from his White Nationalist base. To do that, he and his DHS are promoting cruelty towards migrant children as (1) a deterrent against further immigration from the south and (2) a show for bigots to cheer him on. The cruelty is the point.
Rep. Michael Burgess of Texas is a "good soldier" in the Republican Party.
Chris Hayes wants to have someone on his show to represent the Republican argument, and this is the best he can do on a Monday.
But Congressman Burgess lost his cool, and went way over the top in his comments to Hayes.
His argument that the border facilities are fine is mind-boggling: