The Democratic nominee in a special election in a heavily Republican northcentral Pennsylvania congressional district is the same candidate who lost November's general election by 32 percentage points.
Democrats on Tuesday nominated Marc Friedenberg to fill the term of Republican Tom Marino, who resigned just three weeks into his fifth congressional term.
The 35-year-old Friedenberg is a lawyer and Penn State information technology instructor. Republican delegates are scheduled to pick a nominee March 2, ahead of the May 21 special election.
Several Republicans are already seeking their party's nomination, including Tuesday's announcement by Iraq War veteran Stacy Garrity, a first-time candidate.
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The sprawling congressional district covers all or parts of 15 counties, and Republicans are heavily favored, with about 100,000 more registered voters than Democrats.