McCain ad to rebut Obama’s DNC speech

The campaign was fueling speculation about his running mate, who is to be named at a McCain rally in Ohio tomorrow. A top campaign official says McCain has settled on his vice presidential choice and will notify the person today.

Matt Drudge of The Drudge Report, who has high-level McCain contacts, posted a tease this morning saying: “SOURCE: NAME MAY LEAK AT 6 PM ET… WITH SOME SORT OF CONFIRMATION AT 8 PM.”

Obama is scheduled to speak between 10 p.m. and 11 p.m. Eastern before a crowd of about 75,000 at a Denver stadium where the final session of the Democratic National Convention is being staged.

The leak of the McCain ticket mate would cause a news frenzy at at time when the Obama campaign wanted viewers to be focused on Obama’s economic and change messages.

McCain campaign communications director Jill Hazelbaker said in an MSNBC appearance that the battleground spot is “an historic ad — I think this is the first of its kind.”