Democratic U.S. Rep. Jim Matheson of Utah says he will not run for an eighth term in Congress next year.

Matheson was expected to face a tough repeat challenge in 2014 from Saratoga Springs Mayor Mia Love, a Republican who he narrowly defeated in 2012.

Matheson announced the news in a Facebook post on Tuesday afternoon. His spokeswoman Jessica Gail confirmed the posting and the news.

The congressman says it "has been a tremendous privilege" to serve but his time in the House will not be "the sum total" of his service.

The 53-year-old represents Utah's 4th congressional seat, which covers a string of Salt Lake City suburbs stretching south along the Wasatch Front to Sanpete County.

He is the only Democratic member of Utah's congressional delegation.