Democratic Rep. Carol Shea-Porter of New Hampshire announced Friday she will not seek reelection in 2018.

Shea-Porter, who represents New Hampshire's 1st Congressional District, made the announcement in a statement to her constituents and said has decided to retire after feeling the "tug of family."

"This has been a very difficult decision, given how much I have enjoyed serving [the people of New Hampshire] in the House and the fact that the 2018 election is shaping up to be like 2006, when I was first elected, an important time when Congress changed political leadership and was able to move America forward," Shea-Porter said in a statement. "While I certainly would enjoy being part of that, I felt the tug of family at our reunion on Independence Day, and I have continued to feel it."

Shea-Porter was first elected to represent New Hampshire's 1st Congressional District in 2006, and she has battled former Republican Rep. Frank Guinta for the seat over the last several years.

The Democratic congresswoman lost to Guinta in 2010, but defeated him in 2012. Shea-Porter lost again to Guinta in 2014, but beat him last year.

"Thank you so much for electing me to Congress for four terms," she said in her statement. "You gave me the great honor of representing our state and being the first woman ever to be elected to federal office from New Hampshire, the first Democrat to represent New Hampshire's First District in 22 years, and I have worked each day with only one thought — to serve our state and our nation."

The Democratic Congressional Campaign Committee thanked Shea-Porter for her service, and took a jab at Republicans and former White House chief strategist Steve Bannon.

"Congresswoman Shea-Porter is a dedicated public servant and we are grateful for her many years of service to the people of New Hampshire," DCCC Communications Director Meredith Kelly said in a statement. "There is no doubt that Democrats will hold this seat, and we look forward to competing against whomever Steve Bannon nominates."

The National Republican Congressional Committee, meanwhile, expressed confidence a Republican would win the district next year.

"Yet another Democrat in a district President Trump won is abandoning their seat," NRCC communications director Matt Gorman said in a statement. "The NRCC will continue to put Democrats on defense across the country in 2018. This was already a top pick-up opportunity even before Rep. Shea-Porter's announcement and we are confident we will turn this district red once again."