Elections officials in Florida say they are asking prosecutors there to investigate allegations that former Maryland congressional candidate Wendy Rosen was registered and voted in both states. “After receiving information locally concerning this issue, we are referring this matter to the State Attorney’s Office of the Sixth Judicial Circuit of Florida,” Julie Marcus, the deputy supervisor of elections for Pinellas County, Fla., said Tuesday. State prosecutors in Maryland, meanwhile, declined to say whether they were investigating the allegations here. Rosen, who won a close Democratic primary in April to challenge Republican Rep. Andy Harris in the 1st Congressional District, withdrew from the race Monday after she was confronted with the allegations by the Maryland Democratic Party.