The Whole World In Your Hands
You have your aides secretly install adware on everyone's computers. Soon pop-ups will be spreading across the US, bearing the message "Vote Lewis." Unfortunately, one of your aides is nothing but a low-down prankster, and he installs some viruses attached to your ad that has some...offensive photos of yourself. The election is lost, but you got some retribution when you killed the man. Luckily, you did this in California, so you were easily acquitted on account of being a celebrity. Hey, it could be worse! You won't conquer the universe, but at least you're not in jail.