The answer should be the first one : a return to normalcy and isolationism. The reason for this is because they wanted to keep out of foreign affairs from there on out. Obviously that did not work out as well as hoped since Americans were forced into the 2nd World War as well as the Korean and Vietnamese wars. Hope this helps!
Ciudadanía por Naturalización
La naturalización es el proceso por medio del cual se otorga la ciudadanía estadounidense a un ciudadano extranjero después que este haya cumplido con los requisitos establecidos por el Congreso de los Estados Unidos en la Ley de Inmigración y Nacionalidad (INA, por sus siglas en inglés).
Para más información, vea el Manual de Políticas de USCIS sobre Guías de Ciudadanía y Naturalización.
Manifest destiny was a belief that many Americans had that we should expand and control the land between the atlantic ocean and the pacific ocean. they believed it was our destiny to control this land eventually people believed we should spread the idea of manifest destiny world wide
Because it was a threat to American citizens. It was close enough to do major harm.