As has happened with China? When they opened up trade and became part of a global economy their nationalistic ambitions stopped and they ceased to support dictatorships like Russia. Also their political system opened up and they morphed from a uniparty communist country to a liberal democracy. Oh wait, the exact opposite happened on all accounts.
You didn't answer my question. Why would Vietnam be any different? Why should the US help build their economy so that they can do the exact same thing as China did. Your theory of how this works is disproven by reality. You can not make a country a liberal democracy by opening up trade with them. It failed with China, it failed with Russia.
It worked with South Korea, and Taiwan. (Japan and Germany, but they were on the losing side of a war with us which is a confounding factor). It is by no means perfect, but I've yet to see anyone suggest something else that has any chance of working.
