Almost NOBODY leaves Congress unless they’re about to get caught for something. Chaffetz talks really big now, in support of Trump, but, not unlike Trey Howdy, he was all hat and no cattle as far as doing anything about Trump’s lying enemies. All for show -— a sound and fury, signifying nothing. Odd...Gowdy was another one who abruptly quit. I don’t trust either one as far as I can throw a bull elephant.
About 40 Republicans did not run again in 2018, IIRC. Very odd behavior.