While some Democrats had been turning to sites like eBay and Craigslist hoping to scoop up scalped tickets to see U.S. Sen. Barack Obama's (D-Ill.) speech tonight at INVESCO Field in front of an estimated crowd of over 75,000 people, Republicans are still giving away tickets for U.S. Sen. John McCain's (R-Ariz.) Ohio rally tomorrow, where he had been expected to announce his vice presidential running mate.

The McCain campaign is working to build a crowd of 10,000 for the event in Dayton.