It's time, long overdue.
Having seen no way to retain your seat running in a primary against voters who are fed up with you, after jumping on the Left's bandwagon following the events of Charlottsville (characterizing POTUS as unfit to serve, in effect calling for his resignation), you announce that you will not run for re-election.
This announcement following a one-on-one with the President, who, unsurprisingly, declined to endorse you.
He's too busy cleaning up the Iran Mess you worked so hard to create.
Resign. Now. Go home. Get a head start on appointments to all those corporate boards, university boards, real estate deals, etc etc etc. Take time to work on your golf game.
Let someone serve who won't do bonehead deals like the Iran Mess you helped broker. Remember those pallets of cash that were shipped to the mullahs? You may as well have been piloting the plane.
Do you doubt, once the Mullahs have a nuke on a missile, that they won't threaten Israel and the remainder of the Middle East? These are the folks that keep sending boatloads of materiel to Hamas in the Gaza Strip. Really?
Go home. Now. Before you endanger all of us all the more.