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WASHINGTON (AP) - Voters in the nation's capital are deciding whether Mayor Vincent Gray should get a second term amid a federal investigation of his 2010 campaign.

Gray is facing seven challengers in Tuesday's Democratic mayoral primary.

Polls have shown the mayor neck-and-neck with D.C. Councilmember Muriel Bowser. She says the city needs a fresh start as the mayor faces a possible indictment.

Five people involved with Gray's campaign four years ago have pleaded guilty to felonies. Three weeks ago, federal prosecutors said for the first time that Gray knew about an illegal, $668,000 slush fund that helped him get elected in 2010. The mayor has denied wrongdoing and has not been charged.

Gray is hoping for high turnout in less affluent parts of the city where he remains popular.

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