“Then they bring out everything they have”
That’s not the way the SC works. The SC will only consider evidence that is in the record. The time to bring out everything they have is in the lower courts in order to build the record....
but it it was a motion to dismiss then the presumption is that the non-moving party’s evidence is all true.
so in granting the motion to dismiss, the plaintiff’s evidence (Trump) is all true for the purpose of the motion.