HARRISBURG — John McCain's campaign opened its Pennsylvania headquarters in Harrisburg Friday.

Supporters of the presumptive Republican presidential nominee served pizzas at a reception to mark the opening of the headquarters in a rowhouse a couple blocks from the state Capitol. The building is owned by the state Republican Party, which is renting it to the McCain campaign.

Jon Seaton, McCain's campaign manager for Pennsylvania and Ohio, says the Arizona senator has a good shot at winning Pennsylvania and its 21 electoral votes — even though no Republican has carried the state since the first President Bush in 1988.

Seaton said battlegrounds include Philadelphia suburbs and Western Pennsylvania counties where Barack Obama struggled in the primary.