[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/08/27/art.ap.mccain.waves.jpg caption="Who is Sen. John McCain's VP?."]
DENVER (CNN) – John McCain has decided on his running mate and will officially reveal his pick on Friday in Ohio, multiple sources tell CNN.
A knowledgeable Republican source says there the matter was settled at a major meeting of McCain's advisers Wednesday.
The Arizona senator’s choice has not yet been told of the decision, but the plan is to call tomorrow. A handful of names of dominated VP speculation in recent days, including former Massachusetts Governor Mitt Romney, independent Senator Joe Lieberman, and Minnesota Governor Tim Pawlenty.
The presumptive Republican nominee will appear with his prospective running mate at a massive rally on August 29, the day after Barack Obama formally accepts the Democratic presidential nomination.
The McCain campaign is hoping to have 15,000 people at the Ohio rally — roughly five times the size of his largest crowd to date.