thus are justiciable by the federal courts. In 1964, the U.S. Supreme Court heard Reynolds v. Sims and struck down state senate inequality, basing their decision on the principle of "one person, one vote." With those two cases being decided on a national level, Nevada Assemblywoman Flora Dungan and Las Vegas resident Clare W. Woodbury, M.D. filed suit in 1965 with the Nevada District Court arguing that Nevada's Senate districts violated the equal protection clause of the Fourteenth Amendment of the Constitution of the United States and lacked of fair representation and proportional districts. At the time, less than 8 percent of the population of the State of Nevada controlled more than 50 percent of the Senate. The District Court found that both the Senate and the Assembly apportionment laws were "invidiously discriminatory, being based upon no constitutionally valid policy." It was ordered that Governor Grant Sawyer call a Special Session to submit a constitutionally valid reapportionment plan. The 11th Special Session lasted from October 25, 1965 through November 13, 1965 and a plan was adopted to increase the size of the Senate from 17 to 20. Modern Era (1967–present) The first election after the judicial intervention and newly adopted apportionment law was 1966 and its subsequent legislature consisted of 40 members from the Assembly and 20 members from the Senate. Nine incumbent Senators from 1965 were not present in the legislature in 1967. In the 1981 Legislative Session the size of the Senate was increased to twenty-one because of the population growth in Clark County. Following the 2008 election, Democrats took control of the Nevada Senate for the first time since 1991. In January 2011, Senator William Raggio resigned after 38 years of service. On January 18, 2011 the Washoe County Commission selected former member of the Nevada Assembly and former United States Attorney Gregory Brower to fill the vacancy and remainder of the term of Senator William Raggio. After the 76th Session and the decennial redistricting the boundary changes and demographic profiles of the districts prompted a resignation of Senator Sheila Leslie, in February 2012, and she announced her intention to run against Sen. Greg Brower in 2012. Later in February 2012, citing personal reasons, Senator Elizabeth Halseth resigned her suburban/rural Clark County seat. Legislative sessions Current session Historical activity of political parties Democratic Party (1864–Present) National Union Party (1864–1869) Republican Party (1871–present) Citizen's Party (1879–1881) People's Party