On Friday, Donald Trump amped up his attack on the mainstream media with a series of tweets. In response, one host on MSNBC was not going to let him slide.

MSNBC on Trump

After Donald Trump took part in his controversial press conference on Thursday afternoon, it marked the start of a new level of hate in his war of words with the media. In the day since the aforementioned press conference, the former host of "The Apprentice" has increased his use of social media to pile on the press. On Friday morning, Trump railed against the "fake news" mainstream media, while praising right-wing talk show host Rush Limbaugh in the process.

Hours later, the president went back to his Twitter account, not only accusing ABC News, CBS News, CNN, NBC, and the New York Times of being "fake news," but also labeling them the "enemy of the American people." As expected, backlash quickly followed, as Trump's tweets were highlighted across cable news. In response, MSNBC host of "Morning Joe," Joe Scarborough, used his Twitter feed to call out the president.

"Only a FAKE PRESIDENT would declare the First Amendment to be the enemy of the American people," Joe Scarborough wrote on Twitter Friday night.

In a follow-up tweet, Scarborough didn't hold back. "It's not even Saturday morning and someone is already losing his shit," the MSNBC host added.

"Someone is cranky that Gallup has him at 38% and Pew has him at 39%.

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So now he's resorting to FAKE TWEETS. SAD!," Joe Scarborough wrote. Not stopping there, the "Morning Joe" host added, "This president attacks the judiciary's legitimacy, the intel community, and calls press outlets critical to him 'the enemy of the people.'"

Joe Scarborough sent out several other critical messages on his Twitter account, going as far as calling on other conservatives to stand up for the Constitution.

"Conservatives, feel free to speak up for the Constitution anytime the mood strikes," he noted, before adding, "It is time."

Feud escalates

Joe Scarborough's comments follow the harsh remarks made in recent days during "Morning Joe," along with co-host Mika Brzezinski. While the hosts have had a friendly relationship with the billionaire real estate mogul in the past, the 2016 presidential election and the tension surrounding it has ended any possible chance of getting back on the same page. Earlier this week, Brzezinski announced that Presidential Counsel Kellyanne Conway was banned from the show due to her lack of credibility.