Steve Bannon, President Trump’s controversial chief strategist, left the administration on Friday, in what the White House has called a “mutual agreement” between Bannon and recently appointed White House Chief of Staff John Kelly.

According to multiple news outlets, this decision has been developing over the span of some time, with some claiming Bannon submitted his letter of resignation two weeks ago, soon after Kelly took over White House operations.  Some sources have claimed President Trump was particularly upset over Bannon’s decision to contradict the president’s North Korea strategy in an interview given last week.

Until somebody solves the part of the equation that shows me that ten million people in Seoul don’t die in the first 30 minutes from conventional weapons, I don’t know what you’re talking about, there’s no military solution here, they got us.” Bannon said soon after President Trump told the media he would respond to North Korea’s aggressive provocations with “fire and fury” if a diplomatic solution could not be found.

Bannon, the former head of conservative outlet Breitbart News, was tapped to serve as Trump’s chief executive during his campaign, leading to his appointment as chief strategist once Donald Trump secured the presidency.  Since then, he has been a controversial figure in the media, with some accusing Bannon of harboring prejudicial views, especially in the wake of violent outbreaks between so-called white-nationalists and counter protestors in Charlottesville, Virginia last week.  According to reports, he has also had trouble making friends within the White House, with one senior administration official telling CNN, “Steve was never a team player.”