Bernie Sanders has suggested Donald Trump’s administration is displaying signs of “totalitarianism”.
The Vermont Senator also called the President a “pathological liar” after the President referred to several news outlets as being the “enemy of the American People”.
The 75-year-old, who lost out to Hillary Clinton in his bid to be the presidential nominee for the Democrats, took to social media in response to Mr Trump’s attack on the media.
“In Trump's view people should ignore all the news except what comes directly from him. That is what totalitarianism is all about,” Mr Sanders said on Twitter.
He had previously called Mr Trump “delusional” and said the President might move the United States into “authoritarian mode”.
The comments come as Mr Trump spoke at a rally in Florida where he said the media had become "part of the problem" and "part of the corrupt system".
"Many of our greatest Presidents fought with the media and called them out on their lies," he said. "When the media lies to the people I will never let them get away with it."
In his speech, Mr Trump also promised miners would go back to work and that an Obamacare replacement plan would be ready "in a few weeks".
"The White House is running so smoothly," he said. "So smoothly. Believe me, I and we inherited one big mess."
He also praised Department of Homeland Security secretary John Kelly, who wrote a draft memo which proposed the National Guard should round up undocumented immigrants.
"For the most part, get them [immigrant criminals] the hell out of here and get them back to where they came from," Mr Trump said.
