Kevin McCarthy, a member of the United States House of Representatives, speaks to reporters on Oct 3 at the Capitol in Washington, hours after he was ousted as House speaker in an extraordinary showdown. (PHOTO / AP)

WASHINGTON - Former US House Speaker Kevin McCarthy, who was unprecedentedly removed from the position in early October, announced on Wednesday that he is leaving the US Congress at the end of this year.

In an opinion piece published on the Wall Street Journal, McCarthy said he has decided to "depart the House at the end of this year to serve America in new ways."

"I will continue to recruit our country's best and brightest to run for elected office. The Republican Party is expanding every day, and I am committed to lending my experience to support the next generation of leaders," said McCarthy, who was first elected to the House in 2006.

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Kevin McCarthy's nine-month tenure as House speaker was characterized by intraparty fighting between moderates and Republican hardliners

His decision will further narrow the Republican Party's already slim majority in the House, after George Santos of New York was expelled from Congress last week.

The California Republican was elected House speaker after a dramatic 15-round floor fight in January this year, but was voted out on Oct 3, days after he cut a deal with Democrats to avoid a looming government shutdown, which a handful of GOP lawmakers viewed as giving in to the opposition.

Matt Gaetz, the fellow Republican who led the ouster, had earlier accused McCarthy of caving to what he described as Democrats' excessive spending agenda. Eight Republicans voted with Democrats in the historical ouster.

McCarthy's nine-month tenure as House speaker was characterized by intraparty fighting between moderates and Republican hardliners.

READ MORE: Republican US Rep Gaetz moves to oust McCarthy as speaker

On Oct 25, Louisiana Republican Rep. Mike Johnson, vice chairman of the House Republican conference, was elected the new House speaker, bringing weeks of chaos in the lower chamber to a momentary halt.