Now enforce it!
If the feds decide to go through with this, the question is...would the state authorities stand up to it or would they fold?
For example, image the fbi in Arizona trying to arrest the state republican legislators for auditing their own elections. Would the AZ state troopers / sheriffs / other state law enforcement agencies prevent the fbi from making the arrests?
Would be quite the turning point showdown between states rights and the fed gov.