Manchester Mayor Frank Guinta (R) has filed paperwork to run against Rep. Carol Shea-Porter (D-N.H.), who Republicans have indicated will be one of their top targets in 2010.

Guinta was recruited by the National Republican Congressional Committee and mulled several bids for higher office, including running for governor or Senate in 2010. But according to online records from the Federal Election Commission, the 38-year-old Mayor has filed to run in New Hampshire’s 1st district.

Shea-Porter first won the seat in 2006, when she defeated then-Rep. Jeb Bradley (R) in an upset victory. She defeated Bradley again in their 2008 rematch with 52 percent of the vote.

The 1st district has traditionally been the more conservative of New Hampshire’s two Congressional districts. President Barack Obama won the district with 53 percent in 2008, but former President George W. Bush carried the district with 51 percent in 2004.

Shea-Porter is a member of the Democratic Congressional Campaign Committee’s “Frontline— program for vulnerable Members in the 2010 cycle.