The 1966 California gubernatorial election was held on November 8, 1966. The election was a contest between incumbent GovernorPat Brown, the Democratic candidate, and actor Ronald Reagan, the Republican candidate. Reagan mobilized conservative voters and defeated Brown. This was Brown's second gubernatorial election in which he ran against a future Republican president.
Incumbent Edmund G. (Pat) Brown had been a relatively popular Democrat in what was, at the time, a Republican leaning state. After his re-election victory over former Vice PresidentRichard Nixon in 1962, Brown was strongly considered for Lyndon Johnson's 1964 ticket, a spot that eventually went to Hubert Humphrey. However, Brown's popularity began to sag amidst the civil disorders of the Watts riots and the early anti-Vietnam War demonstrations at U.C. Berkeley. His decision to seek a 3rd term as governor (after promising earlier that he would not do so) also hurt his popularity. His diminishing support was evidenced by a tough battle in the Democratic primary – normally not a concern for an incumbent. Los Angeles Mayor Sam Yorty received 38% of the primary vote while Brown barely received 52%, a very low number for an incumbent in a primary election.
The Republicans seized upon Brown's sudden unpopularity by nominating a well known and charismatic political outsider – actor Ronald Reagan. With Richard Nixon working tirelessly behind the scenes and Reagan trumpeting his law and order campaign message, Reagan received almost 2/3 of the primary vote over George Christopher, the moderate Republican former mayor of San Francisco, and went into the general election with a great deal of momentum. At first Brown ran a low key campaign, declaring that running the state was his biggest priority. As Reagan's lead in the polls increased, however, Brown began to panic and made a gaffe when he told a group of school children that an actor, John Wilkes Booth, had killed Abraham Lincoln. The comparison of Reagan to Booth as being actors did not go over well and led to a further decline of the Brown campaign. Come election day, Reagan was ahead in the polls and favored to win a relatively close election. However, Reagan won decisively; his nearly 1 million vote plurality surprised even his strongest supporters. Brown won in only three counties: Alameda, Plumas, and San Francisco. He narrowly won Alameda by about 2,000 votes (.5%) and Plumas by about 100 votes (1.6%).