As we all know, Congress voted to cancel Donald Trump's declaration of a border emergency and Trump has vetoed that cancellation. So the will of the Congress — not to mention the American people if the polls are to be believed — is being overridden. I'd write an essay here on why this is so troubling but William Saletan has penned a much better one than I could muster.
I'll just add that what's so distressing about this is the total lack of principle involved here…unless you think "I've gotta save my political ass" is a principle. Anyone think the Senators and Congressfolks who sided with Trump on this one would have supported Obama or Clinton if they'd done the same thing? Of course not. The laws don't apply to our guy.