The view from the other side.
For me the content of this ad is not the issue. Obama has endorsed his share of equally questionable ads. What is the issue is a sitting Senator using his goon squad of lawyers to intimidate the exercise of free speech. Nowhere in the first amendment does it specify that the freedom to express an opinion or publish it is limited only to the truth. Put it out there and let the people decide.
Keep this in mind though; an inherent attribute of a facist is to control the message.