Questions about the 74-year-old's health, his recent move to be closer to his children and grandchildren and uncertainty about the Democratic majority in the Senate lead some knowledgeable insiders to speculate that Reid will retire rather than face a challenge in 2016.
"I don't think he will run again," said one insider with decades of experience in Nevada and D.C. politics. "He's not well. His wife isn't well. He has grandchildren. And he may not be in the majority after November."