Associated Press

Democratic Senate candidate Bob Kerrey willl announce tomorrow that he has won the endorsement of former Sen. Chuck Hagel, a Republican, a Kerrey campaign official confirmed.

Mr. Hagel, who served in the Senate from 1996 to 2008 and had a reputation as a political maverick, will cross party lines to endorse Mr. Kerrey in his race against Republican Deb Fischer, a state senator, to fill the open seat now held by Sen. Ben Nelson, a Democrat, who is retiring.

“I will be making a huge announcement tomorrow at 2 p.m.,’’ Mr. Kerrey, a former governor and U.S. senator, said on Twitter late Wednesday…