Unless McCain's buyin'. Roll Call reports "Lieberman Unwelcome at [Democratic] Party Lunches."

Senate Majority Leader Harry Reid (D-Nev.) and Sen. Joe Lieberman (ID-Conn.) have agreed that Lieberman will no longer attend Democrats’ weekly caucus lunches or the biweekly chairmen’s lunches used to formulate policy, senior Democratic aides said Tuesday.

Kicking Lieberman out of the party altogether is a very good reason to vote for Democratic Senate candidates this November.