OIL petroleum and other gas
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!
These are concurrent powers
Answer
popular sovereignty, also called squatter sovereignty, in U.S. history, a controversial political doctrine according to which the people of federal territories should decide for themselves whether their territories would enter the Union as free or slave states.
Some more stuff
Who proposed the idea of popular sovereignty?
In 1854, Democratic Senator Stephen A. Douglas, of Illinois, the chief proponent of popular sovereignty. Courtesy of the Library of Congress. Popular sovereignty in 19th century America emerged as a compromise strategy for determining whether a Western territory would permit or prohibit slavery.
Are there any choices to this question
