High Quality Content by WIKIPEDIA articles! The California`s 4th congressional district election, 2006 was an election for the United States House of Representatives. The two major party candidates were longtime incumbent John Doolittle (R) and challenger Charles Brown (D). Doolittle retained his seat with 104,307 votes (49%) compared to Brown with 97,022 votes (46%).Libertarian Dan Warren got 5% of the vote.