From Politico:
Hagel to announce his future plans next Monday
Sen. Chuck Hagel (R-Neb.), who is up for re-election next year, will be making an announcement on his political future Monday morning at 11:00 EST in Omaha, Nebraska.
Hagel hasn't announced what his decision will be, but he has hinted recently that he may be ready to step down. Washington Post columnist David Broder, after interviewing Hagel last week, wrote that "my guess is that he will say that 12 years of battling the institutional lethargy of Capitol Hill will be enough."
Hagel has been one of the president’s harshest GOP critics on the Iraq war. He has been mentioned as an independent candidate for president because of his outspoken differences with his party over foreign policy.
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Former Sen. Bob Kerrey (D-Neb.) has said he would likely run if Hagel retires. Kerrey, now president of the New School, remains a popular figure in Nebraska. He served in the Senate from 1989-2001, and ran unsuccessfully for president in 1992. His entry would make the Senate race in Nebraska one of the marquee matchups heading into 2008, giving Democrats a newfound opportunity to add to their majority.
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http://www.politico.com/blogs/thecrypt/Repukes must be freaking as the list of vulnerable repuke Senate seats grows.