The US borders Mexico, so if Mexico became a part of the axis powers the US would have to fear an attack on its mainland (from either Mexican forces or other axis forces stationed in Mexico), whereas if Mexico remained neutral the US mainland would be safe.
Oligarchy
I think because they are a small group that rules a country
Sheila is most likely to have negative feelings towards white people
It was based on the necessary and proper clause.
Individuals that are close enough to us to have a strong capacity to motivate our behavior
