i'm grateful Justice Roberts rebuked Trump for his ridiculous call to impeach Judge Boasberg, but I can't endorse as a universal rule that "impeachment is not an appropriate response to disagreement concerning a judicial decision”. i think Justice Roberts' decision in Trump vs US merits impeachment.

awful, wholly unjustifiable decisions by lower court judges — decisions contrary to the text, history, and practice of the law — perhaps do not demand so severe a remedy, since appellate courts can correct them.

but impeachment is one of the few deterrents that might dissuade Supreme Court justices from constitutionalizing the anti-constitutional (thanks @jamellebouie.net). impeachment if anything is a remedy too hard to exercise, rather than too dangerous to judicial independence.