If the Supremes rule against the Federal government in this, it would open the door to MANY abuses.
The Democrats and Progressives, in their INTENSE dislike of Trump, would trample on every precedent. They did that with trashing the filibuster, because it impeded their plans, when they had the majority.
It is biting them in the butt now, when they do not.
I'd like to think even they could learn from recent history, but - probably not.
Read this to find out why.