 CHAR: When Steele and Darius are discussing the presidential chain  of command, Steele says, "President, VP, Speaker of the House,  Secretary of State..." as the chain of command to leave the  Secretary of Defense as President. That skips President pro tempore  of the Senate (after Speaker of the House) and Secretary of the  Treasury (after Secretary of State) so it would require six leaders  be assassinated, not "just" four.