Donald Trump has been known to use social media as a form of self-promotion. After tweeting out praise for a book that is favorable in its coverage of his presidency, Trump quickly came under fire.

Trump on Twitter

It's no secret that Donald Trump is a fan of promoting himself and those who support his agenda. During the early days of the 2016 presidential election, the former host of "The Apprentice" made it a point to hit back at his critics, doing so by tapping into social media and using his following to craft his own talking points. While Trump has made it routine to target those who are critical of him, he's also taken time to give a shout out to others who help support his time in office.

While normally the president finds ways to promote programs on Fox News, he decided to shift course on December 16 with a tweet about a new book from his old campaign manager Corey Lewandowski.

For the first year of Donald Trump's campaign, Corey Lewandowski was the man in charge. Lewandowski would often catch heat for his controversial style, as he eventually stepped down from his role in June 2016 and was replaced by Paul Manafort.

Since then, Lewandowski has remained an outspoken supporter of Trump, and helped author the book "Let Trump be Trump" with conservative activist David Bossie.

On Saturday morning, Donald Trump took to Twitter to promote the book in question. "Congratulations to two great and hardworking guys, Corey Lewandowski and David Bossie, on the success of their just out book, 'Let Trump Be Trump,'" the president tweeted.

"Finally people with real knowledge are writing about our wonderful and exciting campaign," Trump added.

Twitter reacts

In response to Donald Trump's tweet, those who have opposed the administration wasted no time firing back with their own thoughts. "This is illegal. You can’t promote products as President," one tweet read.

"I'm sure Mueller is writing a lot about you, too. I look forward to it," one Twitter user wrote in reference to the Russian investigation.

"Keep kissing the ring of the pretend king and....who knows...maybe Corey will get a new job in the Admin," another tweet added.

"I can't wait to read the part about when a bunch of people get locked up for colluding with the Russians during your campaign," an additional tweet stated. The negative response continued as the opposition to Donald Trump and the current administration moved forward.