Here's a letter from Ned Lamont announcng his intentions.
All the people who dreamed of trying to get Lieberman in a primary now have their chance. I understand Lamont's got real campaign people working with him and they plan to win.
Donate at the link up there or here.
In 2004, without the support of any prominent national elected Republicans (I believe none at all but I'm not sure of that) Pat Toomey came within inches of beating Arlen Specter in a primary - 51/49. There's no reason we can't help make this campaign work.