For all of Hillary Rodham Clinton’s apparent 2016 advantages — in dollars, demographics and Democratic Party support — the Clintons have not won an election in Virginia since Bill Clinton captured the state’s Democratic caucus in April 1992. “Mrs. Clinton has the incumbent governor and his money and organization working on her behalf,” said Larry Sabato, director of the Center for Politics at the University of Virginia. “Even Jim Webb will have a hard time derailing Hillary this time around in Virginia.”