The new ad from the Obama campaign hits McCain squarely on the tactics used by his campaign, and questions his honor outright. Take a look:

This is probably the best ad Obama has put out yet in the general election cycle, and maybe one of the best ads any Democrat has run in the last quarter century or so. It hits undeniable points, that McCain is telling abject falsehoods and trying to smear Obama outright, and it does so with a video that is almost guaranteed to have cable talking about it ad nauseum today, and maybe tomorrow. This is what we mean when we talk about establishing a narrative, and if this ad doesn’t entrench the idea with talking heads that McCain has a problem with the truth, nothing will.