Expansion was needed to keep the United States safe from its enemies.
An early temperance movement began during the American Revolution in advocating temperance rather than abstinence and taking positions on moral issues.
manifest destiny. (APEX)
Their religion developed differently from that found in other Spanish colonies, and their settlements were far from the larger Spanish colonies to the south.
All of the above (Apex)
The areas in question were Utah and New Mexico.
Stephen A. Douglas believed in popular sovereignty.
Kansas–Nebraska Act