In just four days, Donald Trump will head to Washington, D.C. and be sworn in as the next commander in chief on Inauguration Day. While Trump is getting ready to become the leader of the free world, his critics are not backing down, including comedian Bill Maher.

Maher on Trump

Ever since Donald Trump announced his campaign for president, many in the media have spoken out against his controversial candidacy. One person on the left who doesn't hold back his views of the president-elect is Bill Maher, who is known for hosting HBO's "Real Time with Bill Maher." The noted atheist has made the billionaire real estate mogul one of his prime targets over the last year and a half, while openly pleading for Americans to vote against him in the days leading up to the election.

The feud between the two goes back to 2013 when the former host of "The Apprentice" filed a lawsuit against Maher after the comedian made a joke that didn't go over well. Maher elaborated on his thoughts of Trump during a January 15 interview with The New York Times.

During the interview with The New York Times, Bill Maher explained why Donald Trump was a bigger threat to the United States than even George W. Bush was, a president that was on the "Real Time" host's target list for many years. "No one knows what this man is capable of," Maher said of Trump.

"I never, ever, ever felt worried, it never crossed my mind, that George Bush would do something crazy," he continued, before noting "even though I knew he hated me. He never sued me for a joke." Maher's comments were in relation to the aforementioned lawsuit, which was ultimately withdrawn by the president-elect.

Maher also went on to say of Trump, he "lives for vengeance."

Maher on the attack

Bill Maher then went on to discuss the recent fight between Donald Trump and the intelligence community, most notably the FBI.

"When the internal police department is politicized, that's a place I don’t want to be on the wrong side of," he pointed out, while adding, "That's fascism."

"Real Time" returns

Bill Maher will return to HBO for the 15th season premiere of his hit show, and it will kick off this Friday on January 20. The timing of the return is ironic in two ways as it takes place on Maher's 61st birthday, and also occurs on Inauguration Day. With Donald Trump making his way into the White House earlier that day, it's expected that the show will have a heavy focus on the day's events.