Steve Bannon is out at the White House.

That's not surprising. When at Trump Tower earlier this week, President Trump refused to give his support to Bannon, it was clear the former Breitbart guru's days were numbered.

Bannon's advocates will claim that he was the victim of an establishment conspiracy. But I believe his departure is self-inflicted. During his eight months at the White House, Bannon managed to alienate just about everyone he worked with.

By bullying his way onto the national security council (from which he was eventually dispatched), and pushing for trade wars, Bannon earned ire from the national security adviser, defense secretary, and secretary of state. This week, he effectively signed his own firing letter with Trump by ruling out military action against North Korea. Of course, Bannon may have made those comments as one last strike against the consensus he so despises.

By leaking about Jared Kushner and his wife, Ivanka Trump, Bannon gambled that his own relationship with Trump was stronger than the president's relationship with his family. He was wrong.

By threatening members of Congress to vote for the healthcare bill, Bannon wasted political capital aggravating those individuals best placed to either support or sink the president's agenda.

Ultimately, Bannon's failing was his own arrogance. By most accounts, he is an exceptionally bright man with bold ideas. But he forgot that the White House is the ultimate stage. It is full of individuals who are bright, and bold, and ill-disposed to being steamrolled. Bannon has never shied away from a fight, but at the end, he was fighting a one-man war against multiple alliances.

Still, at least we can look forward to Bannon's exit interview.