> Any Senator disclosing classified details would be violating Senate rules which would then place him or her subject to action by the Senate itself. There's o

> Any Senator disclosing classified details would be violating Senate rules which would then place him or her subject to action by the Senate itself. There's only so much they can do, aside from blocking further access to classified information through official channels and stripping committee assignments. Expelling requires a 2/3rds majority, which I doubt they'd get, and Powell v. McCormack established that Congress can't prevent the initial seating of a duly elected, constitutionally qualified member.