There is some speculation that he is leaving the House because he plans to run for Senate.
At any rate, I hope he stays in politics ... he's one of the good guys.
That's possible, because Orrin Hatch is up for reelection in 2018. However, Chaffetz apparently says in his Facebook posting (quoted in the article) that he won't run for
any office in 2018. Not that such statements are always the final word, especially when seats unexpectedly become available....