WASHINGTON—The Republican who leads the House committee primarily responsible for conducting oversight and investigations of the federal government said Thursday he was weighing stepping down from Congress before his term ends.

“If I do step down early, it will be months from now,” Rep. Jason Chaffetz of Utah said in an interview a day after announcing he wouldn’t run for re-election in 2018. “It’s hard for people to believe, I really do want to be with my family more. Maybe it’s more a midlife crisis more than anything else.”

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