Time was, a screw-up like Mark Sanford would disappear from the public stage--permanently.
We live in different times, in these times. Bill Clinton actually blazed the trail for Sanford: he was rescued, forgiven, embraced, and is now lionized by the Democrat faithful. Any stones they throw at Sanford for his escapades will seem especially hypocritical, even for them. This is also the party of Barney Frank, whose adventures over time make Sanford look like a rank amateur. Let's not dwell too much on Anthony Weiner, who is said to be contemplating a run for mayor of new York City.
Govenor/Representative Sanford should not congratulate himself too heartily. His constituents don't love him, and many are embarrassed by him. But given the prospect of putting a Democrat in the House seat, who would be supportive of Himself...well, that was even more unthinkable.
Strange, strange times, when a President has made himself that odious to the citizenry.