It's been a busy week for Democratic presidential candidates.
Jim Webb dropped out.
Joe Biden decided against a bid.
Now Lincoln Chafee has given up his hopes.
Why so quickly?
It's still three months until the Iowa caucuses.
It's not like their chances are any worse today than they were in the summer when they announced their runs.
At least they get a little attention while dropping out of the race.
Next, Martin O'Malley.
Does he last until the new year?