The CNN White House correspondent said Trump supporters are "well-intentioned," but are getting a "twisted" view of the media from the U.S. leader and his loyalists.
The president suggested the media can start wars, and that he needed to warn people about it.
The CNN reporter was heckled as he attempted to report live from the event.
"It can mean a lot of things to a lot of people," Press Secretary Sarah Sanders said after being forced to answer the question.
Self-described 'cheap, digital version of Banksy' launches a conscientious digital prank to criticize Trump.
Jim Acosta quoted the most famous couplet from Emma Lazarus's 1883 poem The New Colossus etched on the Statue of Liberty in his argument with Stephen Miller.
NSA Chief Flynn also discussed lifting sanctions with Russian ambassador.