By declaring a national emergency to build his promised wall at the southern border, President Trump has pitted his presidency against the Constitution’s principles of separation of powers, legislative control of funds, and limited government among others. And, as congressional Republicans have increasingly made clear, they’re not so willing to throw those principles out the window. That leaves the Senate poised to rebuke the president and, in the process, highlight divisions within the party. That’s a spectacle that Trump should avoid.

And there’s a way to do it.