LITTLE ROCK, AR - NOVEMBER 03:  U.S. Sen. Mark Pryor (D-AR) prepares to speak to supporters during an election eve supporter rally on November 3, 2014 in Little Rock, Arkansas. With one day to go before election day, U.S. Sen. Mark Pryor (D-AR) is trailing Republican candidate for senate, U.S. Rep. Tom Cotton (R-AR).  (Photo by Justin Sullivan/Getty Images)