Yes, as long as their American citizens it’s legal
The General Assembly is the main deliberative, policymaking and representative organ of the United Nations. Comprising all 193 Member States of the UN, it provides a unique forum for multilateral discussion of international issues including peace and security.
Spain was the European country that colonized Mexico and southwestern US
It would be the "Necessary and Proper Clause" that establishes many implied powers of Congress, since this allows Congress to do whatever is "necessary and proper" to keep the United States functioning.
L= legislative, J= judicial, E= executive
1.) L
2.)E
3.) E
4.)E
5.)L
6.)E
7.)J
8.)E
9.)E
10.)L
11.)L
12.)E
13.)L
14.)J
15.)L