A statement from Senate majority leader Harry Reid's office:
Today Senator Lieberman and I had the first of what I expect to be several conversations. No decisions have been made. While I understand that Senator Lieberman has voted with Democrats a majority of the time, his comments and actions have raised serious concerns among many in our caucus. I expect there to be additional discussions in the days to come, and Senator Lieberman and I will speak to our caucus in two weeks to discuss further steps.
Let's see...running against your party after you lose the primaries as a Democrat; voting with Bush on key 4th Amendment infringements; deriding your party's leadership as weak-kneed sissies when it comes to national security; endorsing the other party's candidate; speaking at the other party's convention...I think I know where I stand on this.