Senator Tim Johnson (D-SD) has been hospitalized with "stroke-like symptoms" after being stricken in his office earlier today. It has not escaped notice that, should Sen. Johnson not be able to finish his term (which ends in 2008), the Republican Governor of South Dakota could name his replacement. Which could mean a whole new ballgame in the Senate.
Our best wishes to Sen. Johnson for a speedy recovery.
UPDATE: johnk notes in the comments that MSNBC is reporting that Sen. Johnson did not suffer a stroke or a heart attack. Good news. He will remain hospitalized overnight.