Here’s Matheson’s announcement. He’s only 53 years old. Either there’s some as-yet-unknown bad news that’s forced him out or, as a Democrat from Utah, he’s tired of fighting for his political life every two years. In 2002 he won his race by fewer than 1,700 votes. Last year, against tea-party favorite Mia Love and with Mitt Romney at the top of the ballot, he won by fewer than 800 — despite having trailed in one poll by 12 points heading into election day. Love already declared in May that she’d challenge him again next year; maybe he looked at the political landscape, especially with what’s in store for ObamaCare, and figured he might as well retire before the voters eventually retire him.