Chaffetz had been feeling political headwinds in recent weeks, as Democrats mobilized to raise money for a candidate to run against him, as Chaffetz also faced the threat of a possible GOP challenger.
The immediate political speculation was that Chaffetz was warming up for a possible run for Governor in 2020.
Democrats saw the Chaffetz decision more in the prism of a political pendulum that is swinging back against President Trump, and the GOP.
The decision of Chaffetz to retire at the end of his term means that nine members of the House won't be back for the next Congress.
Chaffetz gained notoriety before the 2016 elections by leading inquiries into the email actions of Hillary Clinton during her time as Secretary of State.
Democrats complained the Utah Republican had used his committee post to do little in terms of oversight of the Trump Administration.
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