Nevada's constitution was adopted in 1864. The legislature is composed of 21 senators and 42 assembly members. The governor is elected for a four-year term; Bob Miller, a Democrat in office since 1989, was succeeded by Republican Kenny Guinn, elected in 1998 and reelected in 2002. Republicans Jim Gibbons and Brian Sandoval were elected governor in 2006 and 2010, respectively. The state elects two U.S. senators and four representatives and has six electoral votes. Nevada's leading institution of higher education is the Univ. of Nevada, at Reno and at Las Vegas.