Relieve the suffering of the masses still remaining in Mexico. Liberate the country from its cruel rulers in the cities and pervasive anarchy in the countryside, and work for the change to a regime to a more responsive form of government. Until this is achieved, annex Mexico to the US and administer it as a territory, much like Puerto Rico.
Isn't that the goal of the North American Union? Onlly thing it is more likely to drag us down with them rather than help them.