Hugh Hewitt just reported this on his show, I went to Google news and a few other places and haven't seen any news on this come across the wire.
I suspect it is true though, given the senator's age, hopefully it is nothing serious.
Meanwhile, doctors have reported that the operation to remove a tumor from Ted Kennedy's brain "accomplished our goals", though creepily, Kennedy was awake during the operation and helped the doctors by giving them feedback.
WASHINGTON (AP) — Sen. Robert C. Byrd's spokesman says the 90-year-old lawmaker was hospitalized Monday night at his doctor's urging after suffering from lethargy and sluggishness at his home.
Press secretary Jesse L. Jacobs says the West Virginia Democrat will be there overnight for observation.
Byrd, who is the longest-serving senator in history, voted during a 5:30 p.m. roll call Monday, then went home. Jacobs says that less than an hour later the senator began to feel ill.
He was found to have a fever, and at his doctor's request he was taken to a nearby hospital.
Jacobs added that he didn't know which hospital Byrd was taken to.