SCOTUS would primarily be ruling against a boatload of states - not the President.
If it does, you can bet your life on a burgeoning secessionist bloc emerging in the months to come.
SCOTUS truly has the future of the USA in its lap. The justices will realize that if they allow the Constitution to be shredded now, after all the shredding of 150 years and with a lawless regime taking over, the Republic is finished and the Supreme Court is reduced to a nullity. History will weigh on their shoulders, but that alone will not govern the outcome. Should they fail, it is almost certain that large swaths of the CONUS will refuse to be ruled by jackbooted stooges of the oligarchic monopoly. Secession, with or without bloodshed, will be inevitable. Even a temporary period of martial law could only hold things together for so long. Essentially, there are two peoples existing within one federation, whose diametrically opposed world views are incapable of coexistence. A National Divorce is in the cards. Think Greece-Turkey and their population exchanges in 1923. Think Yugoslavia in the early ‘90s.
Only a miracle can prevent this. While conservatives can live with the other side and can, up to a point, tolerate its stupidity; they cannot live with conservatives - certainly given the direct propaganda programming of the last half decade.