During a press conference on Wednesday, President Donald Trump called CNN's Jim Acosta a "rude, awful person" after the reporter tried to ask several questions, but was cut off or dismissed by the commander in chief.
As the reporter then tried to ask a question about the Russian Federation investigation, a White House aide tried to take Acosta's microphone from him, but he refused to let go. Acosta posted a video on Twitter showing him being denied entry.
White House press secretary Sarah Huckabee Sanders has released a statement accusing Acosta of "placing his hands on a young woman just trying to do her job as a White House intern", calling it "absolutely unacceptable".
Wednesday's event, which began with the president framing Tuesday's election results as a victory for himself and the Republican party, was Trump's first planned, open-ended press conference at the White House since February 2017, and only the second since he took office.
Things went off the rails, for example, when Jim Acosta of CNN refused to cede the microphone after Trump tried to toss it to NBC's Peter Alexander.
"CNN should be ashamed of itself having you working for them", he added.
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Trump added that the way Acosta had treated Press Secretary Sarah Sanders was "awful".
Speaking on his LBC show, he said: "The White House is now telling lies".
Sanders "provided fraudulent accusations and cited an incident that never happened", the United States cable network said. "Jim Acosta has our full support", the network said. "And the way you treat other people is disgusting".
An association representing the Washington press corps urged the White House to immediately reverse "this weak and misguided action".
As the reporter continued, Mr Trump declared: "That's enough, put down the mic" and walked away from his own podium, as if leaving.
"Obviously no hard feelings toward the officer, but I am now giving my hard pass to the Secret Service", Acosta said in the clip.
Acosta then tried to ask about the status of the investigation into Russia's involvement in the 2016 presidential election. I didn't call you.'10.
The White House has accused him of provoking confrontations, and he, in turn, has become a favorite target of insults lobbed by Trump's supporters, particularly during the president's raucous rallies. CNN has been most closely associated with the "fake news" slur, which the president has used constantly to undermine public confidence in the media. The White House ought to be more careful, and the administration certainly shouldn't banish reporters for being critical.