U.S. Rep. Jim Matheson, Utah’s only Democrat in Congress, announced Tuesday that he will not seek re-election, easing the way for Republicans to pick up another House seat in a solidly red state. Matheson was expected to face a tough repeat challenge in 2014 from Saratoga Springs Mayor Mia Love, a Republican he narrowly defeated in 2012. While Utah Democrats admitted Matheson’s decision not to run for an eighth term is a blow, they’re hoping it will set him up to challenge U.S. Sen. Mike Lee or Gov. Gary Herbert, both Republicans who are up for re-election in 2016. …