The issue with mootness is the fact that they obviously changed the law to avoid SCOTUS review, since they won at the District level. If they were sure the law would pass muster they would have defended it. This also means that there is nothing stopping them from simply changing the law back after the Court dismisses it as moot...and the whole vicious cycle starts all over again. Then there is the blatant threat against The Court that if they DON'T judge it moot, then the Demonrats will pack the court, expand it to 11 or more and pack those new spots with leftist justices, which IS legal under the Constitution, since there is nothing that says what size the court has to be. I think at one time it was 11. FDR tried this once, too, and, IIRC, the Court caved in order to not be rendered a liberal sidebar.