Where does the "under oath" part come from? While he did lie in his senate speech, they aren't put under oath before they speak there.
To the best of my knowledge, none of his claims have ever been made under oath. (This contrasts with the Swift boat vets who were under oath when they made their affidavits.)
That's why I put ... I think at the end of the sentence. Are you telling me there is no law to prevent a senator from speaking on the floor of the senate and knowingly misleading congress?