Barack Obama has learned from the 2004 campaign and will not accept scurrilous attacks otherwise known as swift-boating.
Everyone on the right wing (with the exception of most people "officially" associated with the McCain campaign), is pushing this story of Obama being a strong supporter education reformer and former member of the Weather Underground, William Ayers.
Instead of being distracted by the firewalls that have been set up for John McCain, he goes straight for the jugular and makes it perfectly clear that he will punch back much faster and much harder. (I hate using this trivial "fight" language, but I can't think of anything more appropriate right now...more on that later).
Check out the ad below: