In June of 2000, 66,138 Democrats and 80,900 Republicans were registered in Washoe County. George W. Bush defeated Al Gore by a 9.42 percent margin that November in Washoe County and won the state by 21,597 votes.
(Source: Nevada Secretary of State)
To win Nevada, presidential candidates John McCain and Barack Obama will have to focus on the state's second population center: Reno and surrounding Washoe County.