If they rule that a president is above the law, they are effectively creating a monarchy. All divine rights bestowed upon someone by virtue of existence.
Isn't this one of the big reasons americans defend their rights to bear arms? To prevent/remove a tyrannical government?
Yeah, ruling in the favour of this would be a massive Pandora's box and I'm not sure the supreme court would want that at that moment. If Trump were President they would probably agree though.