His new ad has some teeth:
To which the McCain campaign responds:
William Ayers, William Ayers, William Ayers. When Obama goes negative he usually goes after state issues; like this new ad playing in Nevada about nuclear waste or this ad about DHL job losses in Ohio. McCain, on the other hand, mostly deploys blanket negative statements: Obama is a celebrity, Obama isn't ready to lead, Obama doesn't care about the troops. One seems to be aiming for the national polls, the other for the electoral college.