At the White House, however, there is chaos as Reagan's cabinet is led by Secretary of State Alexander Haig.

On September 26, 2015, about a week after the book's release, National Geographic announced that a television film adaptation was in development.

[7] Additional criticisms surfaced from officials that served in the Reagan Administration, who were present at the events discussed in the book, yet dispute what actually happened.

"[10] The following day, Ed Meese, who served as counselor to the president (1981–1985) and Attorney General (1985–1988), penned a joint op-ed with Ronald Reagan Presidential Foundation executive director John Heubusch detailed more inaccuracies in O'Reilly's book, saying "we believe that Killing Reagan does a real disservice to our 40th president and to history itself.

"[16] Conservative commentator George Will called the book a work of "nonsensical history and execrable citizenship."