The possibilities of anything but outright victory are more stark for Mr. Trump. Oh, sure, if he accepts a deal that doesn’t give him a wall he can blame Democrats along with any Republicans who abandon him. But he still would have lost a fight that he picked. He’d end the shutdown weaker than he started. And some of his most ardent supporters could well turn on him for selling them out on his signature issue, affecting his re-election in 2020.
None of this guarantees a Trump victory. It does suggest the president realizes he is now in a fight he can’t afford to lose.