Not quite: it's about changes to election processes done by the judicial and executive branches of the states being sued, since it is stated in the Constitution that the manner of selecting electors to the Electoral College happens "as the legislature may direct".
It is already precedent, that not even a State Constitution has the power to take away the rights of the legislature to determine how electors are chosen -- because the US Constitution is the Supreme Law of the land, and any law which contradicts it is null and void to start with.
That way the Supreme Court can act as arbiters of the law rather than finders of fact, if they want to duck messy situations and appear "apolitical."
#BREAKING: Trump asks Cruz to argue Texas case https://t.co/4Tlp62d9iU pic.twitter.com/ZmZs2sCaAR— The Hill (@thehill) December 9, 2020