The reliably “liberal” (I have trouble using the word for illiberal people) E. J. Dionne Jr. has this figured out: The constitution is a right-wing document.
Our constitutional system of “checks and balances” only works if those in a position to operate the levers of checking and balancing do their job. It is clear that a Republican Congress and Republican appointees to the Supreme Court have no taste for such work. For the moment, President Trump is mostly unchecked and unbalanced.
Unless “constitutionalist” is a word he has trouble with.
Blithe Spirit 
The recent court decisions were constitutional in that they preserve individual freedom or support laws of the country, as in restoring the president’s prerogative to restrict entrance to the country of any group which he deems a national security risk. Precisely what the Constitution is designed to do.
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