New Jersey voters elect Democrat Cory Booker to U.S. Senate NEWARK, New Jersey (Reuters) - Democrat Cory Booker, the charismatic mayor of Newark, was the unofficial winner of a New Jersey special election on Wednesday, handily defeating a conservative Republican to fill the state's vacant U.S. Senate seat. Booker, who had been heavily favored in polls, defeated conservative Republican Steve Lonegan, a former small-town mayor, according to tallies published online by The New York Times, Politico and the Star-Ledger newspaper. The tallies showed Booker with a double-digit lead over Lonegan with three-quarters of the voted counted. Booker becomes the first black U.S. senator from New Jersey. In Washington, Booker will join Republican Tim Scott of South Carolina as the nation's only two black senators. He will fill the U.S. Senate seat held by Democrat Frank Lautenberg, who died in June at age 89. In Newark, Booker supporters crowded the New Jersey Performing Arts Center, waving pom-poms and signs, waiting for the winning candidate to appear on stage. In a message on Twitter, Booker wrote: "Thank you so much, New Jersey. I'm proud to be your senator-elect. Booker, a Rhodes scholar and Yale Law School graduate, rocketed to fame as a booster for the state's largest city, 12 miles from Manhattan, which has struggled with poverty and persistently high crime. His first run for mayor was documented in the Oscar-nominated film "Street Fight." Booker is known to rub shoulders with celebrities and is a near-constant presence on Twitter. During Booker's tenure as mayor, Newark received a $100 million gift to its schools from Facebook founder Mark Zuckerberg, who said he had met Booker and was impressed by his plans. Lonegan is the former mayor of Bogota and former state director of Americans for Prosperity, a political advocacy group funded by the conservative Koch brothers. He has said he opposed federal aid to victims of Superstorm Sandy and more recently voiced support for the Republican House members who forced the government shutdown. New Jersey Governor Chris Christie, a Republican seeking re-election and a possible White House contender in 2016, chose October 16 as the special election date. Democrats said he could have scheduled the special election for November 5, the day of the general election, and accused him of self-interest and wasteful spending. They said he was avoiding being on the same ballot as Booker, who could attract Democratic and minority turnout and cut into Christie's chances of winning re-election by a large margin. Christie, who said politics did not play a role in the decision, said he wanted to let New Jersey voters have a permanent voice in the Senate as soon as possible. Additional reporting by Edith Honan and Barbara Goldberg; Writing by Ellen Wulfhorst; Editing by Ken Wills, Douglas Royalty and Stacey Joyce