The Pennsylvania Democratic Senate primary has a third man in the race -- businessman Joseph Vodvarka (D) filed his nominating petition Tuesday, according to the AP.

Vodvarka submitted his 2,000 qualifying signatures with only hours to spare before the filing deadline. He faces long odds in his bid to upset Sen. Arlen Specter (D) and Rep. Joe Sestak (D).

"I'm not a politician," Vodvarka writes on his website. "I've never served in public office. I'm a manufacturer, a small business owner deeply concerned w/ the loss of manufacturing jobs in America."

He calls for a "level playing field" in international trade agreements.

"Without fair trade we will never have a chance of getting our manufacturing and jobs back," Vodvarka writes.

In the Republican primary, former Rep. Pat Toomey is expected to face Johnstown activist Peg Luksik.

The vote is May 18.