Donald Trump and his sour relationship with celebrities is well-documented and it doesn't appear to be getting better anytime soon. For comedian Bill Maher, his problems with the president are just getting started.

Maher on Trump

While Donald Trump is currently in the White House serving as the 45th President of the United States, most people didn't believe that his election win would become a reality. Back in June 2015, the former host of "The Apprentice" addressed the media on the floor of Trump Tower in New York City and officially announced his campaign for president.

At first, the announcement seemed like nothing more than a joke and possible ploy to get higher ratings for his TV show. Trump referred to illegal immigrants from Mexico as "rapists" and "murderers" during his speech, in addition to making other outrageous policy proposals. Though Trump came across as a carnival barker to some, he was able to gain enough momentum to win the Republican primary before pulling off the shocking upset win over Democratic nominee Hillary Clinton last November. During that time, Trump was widely criticized by the majority of celebrities, including Bill Maher. The host of HBO"s "Real Time with Bill Maher" would hit Trump on a weekly basis, mixing humor with a serious tone in warning the American people to keep him out of office.

After four months on the job, Trump has continued to become Maher's top target, as was seen during a May 11 post on Twitter.

After not personally tweeting in nearly three weeks, Bill Maher returned to the social media platform on Thursday night and his frustration and aggregation over Donald Trump was never more clear.

"Sorry, guys, about not tweeting lately - sometimes the mental patient sends me to a dark place," Maher wrote on his Twitter account, before adding, "And the workload! These lies are heavy!"

Trump's Comey trouble

Bill Maher's tweet appears to be in reference to Donald Trump's recent decision to fire James Comey as the head of the Federal Bureau of Investigation (FBI).

While Comey was once enemy number one for Democrats who blamed him for Hillary Clinton's defeat, he's recently caused problems for the White House by leading the investigation into Russia's impact on the 2016 presidential election, and their role with the Trump administration. Trump decided to fire Comey earlier this week, though the reason behind the termination has been up for debate. The White House previously said that the president's decision was based off of the recommendation of Deputy Attorney General Rod Rosenstein. However, Trump contradicted that claim during an interview with NBC News where he said the decision was his, and his alone, causing further backlash and allegations of falsehoods in the process.