Shimkus is the 14th Republican to announce that he will not run next year, will resign or will seek a different office. Over the six-week congressional recess, a group of Republicans in increasingly competitive districts — including three Texans who won reelection by fewer than five percentage points in 2018 — decided to retire rather than face difficult contests.

Shimkus, however, won reelection by a landslide last year and hails from a GOP stronghold. His seat is expected to stay in Republican hands.

Shimkus was first elected in 1996, taking the former seat of Richard J. Durbin (D-Ill.), who moved from the House to the Senate. He attended the U.S. Military Academy, served in the U.S. Army and worked as a high school teacher before running for Congress.

Shimkus, 61, served on the Energy and Commerce Committee for much of his congressional career, launching two unsuccessful bids to become the panel’s chairman in 2016.

While he has had a reputation as an ardent conservative, he was perhaps known most among his colleagues for his almost legendary Capitol Hill house. His place became the Washington home for three additional top GOP lawmakers turned best friends: House Minority Whip Steve Scalise (La.), Rep. Kevin Brady (Tex.), the ranking Republican on the House Ways and Means Committee, and then-Rep. Erik Paulsen (Minn.), who were often seen together joking and pulling pranks.