Raising the question of multiple entities being able to do so.
Supreme Court decisions cannot be nullified by other parts of government.
If no entity can overturn the USSC then the USSC is not co-equal with the other branches but superior to them; a dangerous precipice to place liberty upon.
However, if the Supreme Court strikes down a federal law, Congress can always modify the law until it is such that the Supreme Court does not consider it to violate the Constitution, then pass it again.
What if the USSC is violating a federal law itself? Notably the Conspiracy Against Rights and Deprivation of Rights Under Color of Law felonies, which make no exceptions in applicability to government agents?
Supreme Court decisions can only be overturned in two ways:
1 -- Legitimate Methods
* That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government... [Declaration of Independence]
2 -- Illegitimate Methods (Passive Resistance)
And then there's active resistance...