Ignoring the law is a threat to democracy because the law was enacted by democratic means. If the executive just ignores it, our democratic republic has turned into an elective dictatorship. The “elective” won’t long remain.
More:
The Biden administration has mastered the art of constitutional avoidance: use the back door to accomplish what it couldn’t do under the Constitution.
If Trump had uttered these same words, they’d call it a “threat to our Republic.”