As of now, many enormous multinational corporations pay 0$, and almost none pay the actual 35% rate.
Enforce this rate, regardless of whether or not profits are stashed in overseas tax havens.
This would immediately close our deficit, end horrible spending cuts that are currently taking place, and allow for taxes to be lowered on the middle class.
One counterpoint which has been made is that this action would bankrupt the so called "profit-defense" industry, an accounting sector designed to help multinationals cheat on their taxes. Good riddance.