The FISA warrant on Carter Page allowed for the "two-hop" rule, meaning that anyone Page talked to, and anyone that that anyone talked to, could be monitored by the FBI.
I would assume that any state in which anyone within the two-hop who was monitored, would be an appropriate venue, since a Federal crime was committed there.
Plus, Carter Page is selling a book about the illegal surveillance perpetrated on him. That book will sell in every state in the Union.
Fedzilla can invoke the Commerce Clause for jurisdiction. They’ve done it before on far weaker grounds.