1. In 1948, when Republican candidates Harold Stassen and Thomas E. Dewey debated on KEX Radio in Portland, Ore.
2. Twice: in 1996 and 2000.
3. Republican Margaret Heckler, who served in the House from 1966-82.
4. David Treen, governor from 1979-83, and Mike Foster, governor from 1995-2003.
5. Democrat Dalip Singh Saund, U.S. representative from California from 1956-62.