Voters in New Jersey are going to the polls today to fill the Senate seat left vacant by the death of Sen. Frank Lautenberg. Newark Democratic Mayor Cory Booker is leading in the polls against Republican rival, Steve Lonegan, a former mayor of Bogota and former state director of the Koch-backed Americans for Prosperity. New Jersey Republican Gov. Chris Christie called the special election at a projected cost of $24 million rather than waiting three weeks until Election Day, when he himself is up for re-election.