• H. R. McMaster will resign and be replaced by John Bolton, a Fox News commentator and former United States ambassador to the United Nations. McMaster had reportedly been discussing his departure with Trump for several weeks. "The two have been discussing this for some time. The timeline was expedited as they both felt it was important to have the new team in place, instead of constant speculation," a White House official said. "This was not related to any one moment or incident, rather it was the result of ongoing conversations between the two." McMaster, a three-star Army general, also announced that he would also retire from the military. Bolton will be Trump's third national security advisor in 14 months. (New York Times / Washington Post / Bloomberg / CNN / Politico)

  • Steve Bannon oversaw Cambridge Analytica's early efforts to collect Facebook data as part of a program to build detailed profiles of millions of American voters. The 2014 effort was part of a form of voter persuasion touted by the company, which Bannon used to identify and test anti-establishment messages that later would be used in Trump's campaign speeches. Among the messages tested were "drain the swamp" and "deep state." (Washington Post)