Whatever happened to the other Congressman Campbell from northern CA, a liberal Republican who tried to run for the Senate several years back?
That was Tom Campbell. I believe he's now a tenured professor at Stanford University. When Stanford offered him tenure if he taught full time (instead of part-time, with most of his time being spent in Congress), Campbell decided to challenge Dianne Feinstein in the 2000 Senate race, since I guess he figured that if he was going to forgo tenure at Stanford it might as well be for a 6-year job. Running to the left of Feinstein on social issues is no way for a Republican to mobilize the base, and he was defeated handily.
DJ, if I got any details wrong, please correct them (I was paraphrasing what I read in Mike Honda's page on the 2002 Almanac of American Politics).