How Far are you willing to go?
It would be between increased population, a steady stream of agricultural production, and technological advancements. As for the most important one of those three; that would be agricultural production.
Kind of sounds like you're talking about lobbyists? They basically influence government figures through favors, usually endorsements and cash. They influence decisions and what the US does abroad. A big reason why we support Saudi Arabia so much, because we do business with them.