During his tenure, the media-savvy congressman launched high-profile and frequently controversial investigations into the Obama administration and other Democratic targets, notably Hillary Clinton's use of a private email server as secretary of state.
Chaffetz has been active in the House's probe into links between the 2016 presidential campaign of Donald Trump and the Russians.
Chaffetz, chairman of the House Oversight Committee, recently subpoenaed former FBI Director James Comey's memos, and invited him to testify before his panel next week.
Republican Representative Jason Chaffetz, the chairman of a committee looking into President Donald Trump's decision to fire Federal Bureau of Investigation chief James Comey, said on Thursday he will depart Congress at the end of next month. But until his recent moves, critics suggested that he had been less interested in probing potential wrongdoing inside the Trump administration.
Chaffetz announced the news in a May 18 letter to constituents.
In a Republican-led Congress, though, it doesn't seem likely that whoever replaces Chaffetz as oversight chair will be less interested in meddling in D.C. Reports indicate that South Carolina Congressman Trey Gowdy, who headed up the Benghazi investigation, will likely take over the committee. Gary Herbert says he will call a special election to fill Rep.
Trump administration keeps Iran deal alive, but with new sanctions
The Syrian agency produces unconventional weapons, such as the chemical weapons Assad's forces used earlier this year. This may be meant to "undercut the impression that Trump is softening on Iran", The Associated Press wrote.
Chaffetz previously has not ruled out another run for public office at some point in the future.
Prior to his time in office, he worked in communications for more than a decade and served as campaign manager for former Utah Gov. Jon Huntsman Jr.
"I kind of had a little bit of a midlife crisis".
Herbert added that Chaffetz's resignation and the following clamor "doesn't really affect me politically" - thus he has no conflicts of interests here - and he will simply follow current election law (as near as possible, ) and that all primary voters should decide on their party's candidates. "I just haven't seen it".
Chaffetz spoke with reporters about his decision to resign the 3rd Congressional District seat on Thursday at his home in Alpine, ending weeks of speculation.
U.S. Rep. Jason Chaffetz, R-Alpine, announced Thursday via letter that he will be resigning from Congress as of June 30.
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