Hokay, I've given this a lot of thought, and here's what I've got:
Through careful use of fried peanut-butter-and-banana sandwiches, I will kill the Christian Coalition! Lemme 'splain...
Step one of worldwide domination is ingratiation. My niece, being my kin, has been instructed in the art of eyelash-batting and "Pweese" saying (even though she's had perfect diction and grammar and an excellent vocabulary since she was four). I will regularly take her to various mega-churches across the country and through various hypnotic effects (including that of having the cutest niece ever) become friends with all the charismatic church leaders.
Steps two and three are simultaneous. With the help of the suitcase, I will convince the leaders in question to band together to both take back America and replace the obviously corrupt (Left Behind series, various other propaganda) officials of the United Nations (never mind that it's a worldwide organization; its presence in New York means that Americans should run it!), with myself as one of the (unpublicized) party members. At the same time, while we plan the various steps we're going to take, I'm serving up chicken-friend bacon strips, Po'boy sandwiches, chit'lins, Texas toast, and any other fatty foods the (mostly Southern Baptist) contingent wants. All this food is going to be laced with a drug that causes arrhythmia, and will slowly build up in their systems. I, of course, will just have the salad.
During step four, we use covert or overt brute-force tactics to take over the White House, Congress, and the United Nations. In all the excitement, some of my compatriots will drop dead of heart attacks. Barring that, I'll continue to hold celebration parties with the aforementioned laced food until all the other U.N. plants are gone, and I will (regretfully, sniff) take the position of head of the U.N. council. At that point, I will declare the illegal takeover of the United States to be cause for war, and unite the U.N. against the terrorist state. A large number of high-ranking officials in the United States, having eaten too many laced peanut-butter-and-banana fried sandwiches, will die of heart attacks during the ensuing war, and the leaderless country will fall before the might of the world.
Once the United States is subjugated to the United Nations (which is headed by me, my niece, and my suitcase), I will control the world.
Mwuaha. Mwuaha. Mwuahahahahaha!