(CNN) - Rep. Joe Sestak gets the backing of a big name Monday morning as House Financial Services Committee Chairman Barney Frank endorses his fellow Democrat's bid for the U.S. Senate against incumbent Sen. Arlen Specter.
According to a press release from the Sestak campaign, Frank will endorse the representative from Pennsylvania's 7th congressional district when the two men team up at a news conference in Philadelphia.
Specter, up for re-election next year, is fighting for a sixth term in the Senate. The longtime Republican switched his party identity from Republican to Democrat earlier this year. Even though Specter has the backing of the Democratic Party and the White House, he's facing a primary challenge from Sestak, a former Navy admiral who first won election to Congress in 2006.
In published interviews, Frank has been critical of Specter's party switch.
Polls in Pennsylvania indicate that Specter's large primary lead over Sestak has shrunk to the low double digits.
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