A leader of the National Republican Senatorial Committee told CNN on Dec. 29 that Sen. Ben Nelson's reelection bid could be one of five key races that could lead to a Republican majority in the Senate in 2012. NRSC executive director Ron Jesmer said Nelson is "in serious trouble and kind of in a league of his own." Nelson has toed the line between political parties, taking fire in Nebraska for his key vote in support of the Democrat-supported health care reform, but leaning Republican with his recent vote in opposition of the DREAM act and his early support of the bi-partisan tax deal. Jesmer also named races in Montana, Virginia, Florida and North Dakota as key targets for the GOP in 2012 when 23 of the 33 Senate seats up for grabs are held by Democrats. Two Republican-commissioned polls released in the past two months show Nelson trailing potential Republican challengers in the 2012 race for his Senate seat.