I stand by my no-McCain vow I made years ago after his role in campaign speech limitation. But Obama does not look like a very promising alternative:
The Obama campaign disputes the accuracy of the advertisement, which is
fine. It has also threatened regulatory retaliation against outlets
that show it, which isn't fine. Instead of, say, crafting a response
ad, Obama's team had general counsel Robert F. Bauer send stations a
arguing that "Failure to prevent the airing of 'false and misleading
advertising may be 'probative of an underlying abdication of licensee
responsibility.'" And, more directly: "For the sake of both FCC
licensing requirements and the public interest, your station should
refuse to continue to air this advertisement."
In particular, I would love to see Obama actually say what positions that are ascribed to him on gun control are false, and what his actual, specific positions are. A vague, gauzy support for the second amendment does not necessarily mean he has walked away from his earlier positions. In fact, I am sure that McCain would say he supported the First Amendment but I would certainly feel comfortable pointing out how he fails to do so in the details.