Many, including myself, have floated the idea that should McCain win the Republican nomination, it might not be a stretch to see a McCain/Lieberman ticket and this does nothing to dispel that thought process.
Word is the two will appear on NBC's Today Show as well as at a New Hampshire townhall meeting where Lieberman will officially give his endorsement to John McCain.
An aide to Lieberman tells CNN he decided to endorse McCain because he considers him "the most capable to be commander in chief on day one of his administration, and the most capable of uniting the country so that we can prevail against Islamic extremism."
The Lieberman aide insists the senator does not see this as a "commentary on or an endorsement of the Republican party, only the person."
Lieberman had not planned to endorse anyone until after the primary season, but McCain asked Lieberman for his endorsement a few days after the two men returned from a Thanksgiving trip to Iraq together, and Lieberman decided to do it, according to the same Lieberman aide.
All in all, not a bad weekend for John McCain.