Well first I have to lay some ground work. Gotta build up a past that people will be in awe of. Military helps with that, I'll have to get a lot of medals. Then with the connections I'll have with the military and intelligence community, I'll have inside access to information and a support network. It gets more simple from there. Allow a horrible false flag attack that I stop heroically, maybe stop a nuclear weapon from detonating in a major city. That'll give me a boost in popularity and money from advertisements and a book or three. Use that popularity, plus inside intel, plus money to get elected President. Buy off the media and after having them pump me up, call a Constitutional Convention to remove Presidential term limits. Them buy, blackmail, or threaten a few foreign leaders. Use the UN to push my agenda and before I know it, I'll have the world.