(CNN) – Sen. Arlen Specter capped a hard fought Senate primary Tuesday night with a concession call to Rep. Joe Sestak.
"I have just called congressman Sestak to congratulate him and tell him that I think it is vital that we keep this seat in the Democratic Party, and that I will support him in the election," Specter said.
Related: After 30 years in Washington, Specter ousted by voters
Specter gave a short speech to followers after it became clear that Sestak would carry the night.
"It's been a great privilege to serve the people of Pennsylvania," Specter said. "And it's been a great privilege to be in the United States Senate, and I will be working very, very hard for the people of the Commonwealth in the coming months."
[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/05/18/art.specter.rachel.jpg caption="Sen. Arlen Specter speaks to reporters in Philadelphia."](CNN) - About two hours before polls close in Pennsylvania, a subdued Sen. Arlen Specter walked into the Sheraton Hotel in Philadelphia and told reporters he is optimistic about the outcome of tonight's Democratic primary race.
"I'm optimistic if we get out our vote. I've been in a lot of tough races, a lot of close races," Specter said. "I would describe six of my races as the political fight of my life. I am like a cat with seven lives."
After a hard fought campaign, Specter can only wait for results to be announced.
"No regrets. No regrets. No regrets," the incumbent senator said.