Having hit McCain on the economy last week, the DNC rolls out an ad today with some arresting images from Iraq going after him for his "100 years" comment and tying him to Bush. It will air this week on cable channels. Howard Dean offered the preview on "Meet the Press" and laid down a pre-emptive response to the McCain/GOP response that McCain was alluding to a peaceful U.S. presence in the country a la South Korea or post-WW II Germany : “Now, does anyone think who's watching this show that if you keep our troops in Iraq for 100...