Mark Sanford was an adherent to 3 terms and out. He’s now serving in his third consecutive term in his second go-around in Congress, so he should (ought to) retire at the end of this term.
It’s unfortunate about him, though. He was an excellent Congressman and leader during his first tenure, and ditto for a decent part of his Gubernatorial reign, but after the incident with his South American paramour, he seemed to lose all judgment and has been mediocre since.
And guess what, Fienning has now dropped out of the race against Sanford. Currently no challengers of any party.