My theory: All those cheering this guy (who is probably a good guy) should refuse to pay their taxes. Why? Because an invalid President signed the tax laws.
They then can go to court for refusing to obey laws made by an invalid President, and see how far it will get them.
“Yeah, and if millions did this the whole corrupt system would collapse!” < / sarcasm >
Silly sh*t, the System is going to collapse anyway.