By Adam Pagnucco.

As chronicled by both Seventh State and the Washington Post, this is the attack ad being run by a group of unions and Casa in Action against County Executive candidate David Blair.  Unlike Roger Berliner’s ad, this one has no positive component to it.  We have consulted many of our sources who have been in MoCo politics for decades and none can recall a more negative TV ad ever run in a Montgomery County Executive campaign.