WASHINGTON (CNN) -- Senate Minority Leader Harry Reid said Friday he won't seek reelection in 2016, a surprise move that's certain to open a fierce battle for his seat as well as a fight to lead the Democratic party in the chamber.
The fifth-term Nevada Democrat had denied retirement rumors for months, which grew louder after he suffered serious injuries in an exercising accident on New Year's Day. He said in a video posted on Twitter and Youtube that the bruises were "nothing," but added that "this accident has caused us for the first time to have a little bit of downtime ... time to ponder and to think."
"We have got to be more concerned about the country, the senate, the state of Nevada, than us. And as a result of that, I'm not going to run for reelection," he says in the video.
Reid was a top GOP target and expecting a fierce reelection fight, and he says in the video that he feels it would be "inappropriate" for him to "soak up all those resources" while Democrats have a real shot at taking back the Senate. In an interview with the New York Times, Reid notes that many of Democrats' top targets are in big, expensive states, naming Pennsylvania, Missouri, Florida and Maryland as examples.
"The decision I made has absolutely nothing to do with my injury, and it has nothing to do with my being majority leader, and it certainly has nothing to do with my ability to be reelected, because the path to reelection is much easier than it probably has been any time that I've run for reelection," he says in the video.
A member of Reid's staff tells CNN that the senator made the decision to retire with his family around Christmas, but told his staff that he wanted two months or so to sit on it before announcing it.
When his eye injury happened, on New Years' Day, it became clearer to him that he should retire. He hesitated, however, because he didn't want the decision to be seen as a result of his injury.
This aide says Reid has been telling people in private meetings that it's not so much about how he feels physically, which he says is great --- the decision was based on how he would feel in eight years, which remains an open question. Reid, the source said, doesn't want to be one of the senators who's perceived to have stayed in the Senate past his prime.
Reid told the New York Times: "I want to be able to go out at the top of my game."
The notorious sports fan and boxer added: "I don't want to be a 42-year-old trying to become a designated hitter."
Likely replacements for senate minority leader include Illinois Sen. Dick Durbin and New York Sen. Chuck Schumer. A top Democrat on the Hill tells CNN that Schumer intends to start making calls later Friday morning to some of his fellow Democratic senators, trying to begin the process of succeeding Reid. One source close to Durbin, the second ranking Democrat, told CNN it's too soon to rule him out of the fight.
Schumer issued a statement within minutes of the announcement praising Reid as "one of the best human beings I've ever met."
"His character and fundamental decency are at the core of why he's been such a successful and beloved leader. He's so respected by our caucus for his strength, his legislative acumen, his honesty and his determination. He has left a major mark on this body, this country, and on so many who have met him, gotten to know him, and love him," Schumer said.
Reid, who was first elected in the House in 1982 and to the Senate in 1986, rose to Senate Democratic leader in 2005 and served one of the longest tenures as floor leader in Senate history.
Deirdre Walsh contributed to this report.