In his 1823 state of the union address, president james monroe laid out the core principles of what would come to be known as the monroe doctrine. what is the main contention of the monroe doctrine

It warns the European nations that the United States would not tolerate further colonization or attempts of monarchy.

The Americas were not Europe’s to conquer and colonize anymore; the United States considered the Americas their own sphere of influence.

Explanation:

Monroe pronounced: “As far as I’m concerned, the era of colonization is over.”

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.