Table:
text: United States House of Representatives elections, 2010
California
California
District Incumbent Party First_elected Result_ Candidates
California 7 George Miller Democratic 1974 Re-elected George Miller (D) 68.3% Rick Tubbs (R) 31.7%
California 15 Mike Honda Democratic 2000 Re-elected Mike Honda (D) 67.6% Scott Kirkland (R) 32.4%
California 20 Jim Costa Democratic 2004 Re-elected Jim Costa (D) 51.7% Andy Vidak (R) 48.3%
California 21 Devin Nunes Republican 2000 Re-elected Devin Nunes (R) unopposed
California 22 Kevin McCarthy Republican 2006 Re-elected Kevin McCarthy (R) 98.8% John Uebersax (W/I) 1.2%
California 24 Elton Gallegly Republican 1986 Re-elected Elton Gallegly (R) 59.9% Timothy Allison (D) 40.1%

Question: What constituency did George Miller serve in the 2010 United States House of Representatives election, California?