Senators are about to take the unusual step of discussing an ethics case on the Senate floor.

Tune into C-Span around 2:30 p.m. Thursday and you will see Senate Ethics Committee Chairwoman Barbara Boxer, D-Calif., and ranking member Johnny Isakson, R-Ga., discussing the investigation they opened into the conduct of former Sen. John Ensign, R-Nev., who resigned recently due to the fallout from an affair he had with a member of his staff.