Exactly.
I did not hear Lott's speech. But it sounds like he probably did not mean he was proud to support Thurmonds's campaign concerning segregation. He would be stupid to do so. However, having said that, he should have chosen his words more carefully and, for the sake of his party and conservatism, should resign. The author is correct, we need to diffuse this now. The only way he can make it right is to resign. Harsh, but I see no other option. As a politician, he should know to pick his words more carefully.