It’s official: 2002 Democratic nominee Katrina Swett (D) has filed to run again for New Hampshire’s 2nd Congressional district.

Swett’s announcement was expected — a local New Hampshire newspaper reported earlier this week that Swett, the daughter of the late Rep. Tom Lantos (D-Calif.), was already planning campaign events for her bid. Swett confirmed her bid Thursday in a statement from her campaign.

Swett’s entrance into the race sets up a competitive primary for Democrats in New Hampshire, where attorney Anne McLane Kuster (D) has been running and fundraising for several months. Swett could afford to wait to make a decision because of the more than $825,000 she had in her campaign account from an abandoned Senate bid in 2008.

Primaries can be devastating to parties in New Hampshire because they are so late in the election cycle. Swett and Kuster, plus GOP candidates former Rep. Charlie Bass and 2008 GOP nominee Jennifer Horn will face each other in their respective party contest in September.

Bass, who ended Dick Swett’s House tenure in 1994, defeated Katrina Swett, his wife, in 2002. He was defeated by Hodes in 2006.

CQ Politics rates the race Leans Democratic.

*To follow all the 2010 House races, check out our election map.*