In a speech to the Department of Justice, Trump said US media outlets are "political arms of the Democrat party. And in my opinion, they're really corrupt and they're illegal. What they do is illegal."
He did not provide any examples of any wrongdoing, reports the Deutsche Welle.
He went on to single out CNN and MSNBC, claiming without evidence that they "literally write 97.6% bad about me." He also said: "It has to stop. It has to be illegal."
He claimed the media is "influencing judges and it's really changing law, and it just cannot be legal. I don't believe it's legal. And they do it in total coordination with each other."
Trump has repeatedly attacked the media for reporting he views as biased against him. He has also called journalists "enemies of the people."
Trump's address to the Department of Justice was meant to drum up support for his law-and-order agenda. But his speech became a victory lap for his dismissal of two federal investigations into him.
"We will expel the rogue actors and corrupt forces from our government. We will expose, very much expose their egregious crimes and severe misconduct of which was levels never seen anything like it," Trump said in the speech that veered into topics ranging from illegal immigration and crime to the price of eggs and the media.