The disciplinary measure comes as a number of Republicans--including Mitch McConnell and Kevin McCarthy--have publicly denounced his recent comments asking when the phrases "white nationalist" and "white supremacist" became so offensive.
"As with any animal that is rabid, Steve King should be set aside and isolated, " Rush said Monday in a statement that also called on Republicans to strip King of his committee memberships until he apologizes.
I have a scheduled meeting with him on Monday, and I will tell you this: I've watched on the other side that they do not take action when their members say something like this.
"I will not stand back as a leader of this party, believing in this nation that all are created equal, that that stands or continues to stand and have any role with us".
McCarthy wasn't alone in his disgust for King's statements.
He added, "Why did I sit in classes teaching me about the merits of our history and our civilization?"
"That language has no place in America", McCarthy, of California, said on CBS's Face the Nation said. Two House Democrats unveiled motions to censure the polarizing Iowa Republican. King told The New York Times in a story published Thursday. Republicans have chided him for his remarks but the Congressional Black Caucus has a form of punishment for King: removing him from all of his committee assignments.
"We have made significant progress in our nation, and while there is still work to do, we can not let these intolerant and hateful views hold us back".
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".
Rep. Tim Ryan (D-OH) filed a resolution in the House to condemn and censure Steve King (R-Iowa) for remarks that "legitimize white supremacy and white nationalism as acceptable in today's society".
House Speaker Nancy Pelosi, D-Calif., said "we'll be acting on that" when she was asked about King last week. I think he's absolutely right. President Donald Trump was roundly criticized - including by Scott and other Republicans - for his failure to condemn white supremacists following a violent 2017 rally in Charlottesville, Virginia, that left one counter-protester dead.
King has already drawn a primary challenger for the 2020 election: Randy Feenstra, a state senator.