[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/09/20/art.obama.file.t.gi.jpg caption ="President Obama will headline a fundraiser in Pennsylvania on Monday."]
Washington (CNN) - President Barack Obama heads to Philadelphia on Monday to not only try and keep the state's open Senate seat in Democratic hands but to also raise funds for his party.
CNN learned Friday that Obama will be the main attraction at a fundraiser for the Democratic National Committee. The DNC has committed to spending $50 million to help Democratic candidates running in this year's midterm elections.
While in Philadelphia Monday, the president teams up at a separate fundraiser for Rep. Joe Sestak - the party's Senate nominee.
The president's visit will come one week after Vice President Joe Biden headlined a Sestak fundraiser in the Philadelphia area. Sestak also teamed up with former President Bill Clinton at a campaign event that same day.
Last year, the former admiral and two-term congressman from southeast Pennsylvania challenged Republican turned Democrat Sen. Arlen Specter for their party's nomination. Obama and Biden both supported Specter. But Sestak survived a nasty intra-party battle and defeated Specter in the May 18 primary.
Sestak finds himself trailing former Rep. Pat Toomey, the Republican Senate nominee, in both campaign cash and in the polls.
Also Monday, Obama will participate in an hourlong CNBC-sponsored town-hall meeting at Washington's Newseum.