Kennedy, 52, a fiscal moderate with a law degree from the University of Virginia and an advanced degree from Oxford, served as state Secretary of the Treasury and was special counsel to former Gov. Buddy Roemer.

CNN: Vitter fights Dems, history

But how many moderate Republicans are willing to put up with a similar degree of humiliation?

ECONOMIST: Christine Todd Whitman

The men were asked in a questionnaire whether they suffered from ED and at what degree they were impotent (mild, mild-to-moderate, moderate or severe).

CNN: STORY HIGHLIGHTS