Alice Constandina "Dina" Titus ( TIE-təss; born May 23, 1950) is an American political scientist and politician who has been the United States representative for Nevada's 1st congressional district since 2013. She served as the U.S. representative for Nevada's 3rd congressional district from 2009 to 2011, when she was defeated by Joe Heck. Titus is a member of the Democratic Party. She served in the Nevada Senate and was its minority leader from 1993 to 2009. Before her election to Congress, Titus was a professor of political science at the University of Nevada, Las Vegas (UNLV), where she taught American and Nevada government for 30 years. She was the Democratic nominee for governor of Nevada in 2006.