The Monroe Doctrine
It was believed that as free countries, the combination of Spanish-American nation could trade more goods with the Great Britain. This was seen as a factor that could decrease the level of trade between Spain and the great Britain.
Guizot, a French statesman, allegedly said that France did not want one power to control all of North America. Like Monroe, Polk avoided detailing exactly what constituted creating a “balance of power.” Polk kept his interpretation flexible enough to support his active foreign policy (Sexton 106).
This is a challenge for the present and future presidents of the US, in which they should be able to uphold and continue this dominance for as long as they can.