Donald Trump bans 3 media houses. Journalists from CNN, MS NOW and Politico cannot enter the White House. Their press cards stop working. Trump is angry about reports. He calls reports 'Fake-News'. That means false news.
The media fights back. They file a lawsuit against the government. The law in the USA protects the press-freedom. This law stands in the constitution. The constitution is the most important law. The media says: The government must not stop journalism.
Other big stations protest too. ABC, CBS, Fox News and NBC help. They stop reporting about Trump for now. They find the behavior dangerous. Trump attacks media often. He insults journalists at press meetings.