The United States has a variety of techniques for making sure its business interests get what they want. Aircraft carriers are one (see Iraq, and possibly Iran if things go south), CIA-sponsored coups another (Guatemala, El Salvador), economic sanctions a third (Iran again, Russia, much of Latin America). Negotiation at gun point often takes the form of crippling sanctions until and unless a US-friendly regime is in power - there's no actual guns, but there's also no free elections.

Noam Chomsky is a great resource if you want to go deeper on this topic.