McCarthy announced that the House Republican Steering Committee - which oversees committee assignments - met Monday night and made a decision that King "will not be serving on committees in this Congress".
"That language has no place in America", McCarthy said.
In a New York Times interview last week, King asked, "White nationalist, white supremacist, Western civilization - how did that language become offensive?"
King has since said that he is not a white supremacist or a white nationalist.
In a speech from the House floor on Friday, Mr King said he regretted "the heartburn that has poured forth" as a result of his interview.
He said it was a "mistake" to use phrasing that "created an unnecessary controversy" and denied being racist. Meanwhile, Democrats are still threatening further action against King, with two different censure resolutions having been introduced already. It is more severe than a reprimand, but not as severe as expulsion.
"What Steve King said was stupid". King told the Times reporter.
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In a statement, King insisted that his comments had been "completely mischaracterized" and blasted McCarthy for what King called "a political decision that ignores the truth". The top three Republicans in the House and other lawmakers from the party condemned the remarks.
'As Congressman King's fellow citizens, let us hope and pray earnestly that this action will lead to greater reflection and ultimately change on his part'.
Rush's resolution lists comments from King, including a 2006 suggestion by the congressman to electrify the border fence like migrants are livestock, his 2013 bill against citizenship for "anchor babies", his 2016 comment that "the idea of multiculturalism, that every culture is equal - that's not objectively true", his 2017 tweet that "we can't restore our civilization with somebody else's babies", and more.
Even King's excuse that he was simply defending our "civilization" rings hollow, because he has consistently used that word as a euphemism for "white people". Rep. King's statements are unwelcome and unworthy of his elected position.
Ted Cruz joined others in his party Sunday morning in denouncing a colleague who seemed to suggest that the idea of white supremacy is not offensive.
In addition to Romney, Senate Majority Leader Mitch McConnell, R-Ky., also weighed in on King. I think he's absolutely right, ' Romney said.
"I may not have everybody with me, but this is one member of Congress [who] will stand up to Steve King and his entire ilk and ideology", he said. It would be odd if Trump, who appears to be up-to-date on the details of Amazon founder Jeff Bezos's divorce, was unaware of one of the largest stories riling the Republican party over which he presides.