The concept of "Constitutional norms" is a fiction made up to graft UK concepts of tradition and precedent onto a short farmers and scholars document written in black ink on parchment. That document has no "norms", it has black and white commands to secure the blessings of Liberty to ourselves and our Posterity.
Anytime someone claims an elected President (always a Republican, BTW) is violating some made-up "norm", it's time to reach for your wallet or your rifle.