Federal power
The Constitution gave the federal government more power to defend the states and pay debts through taxation. It also provided a central power for other countries to negotiate with and create trade agreements.
He resigned because he'd already had enough trouble as president. Mainly the Watergate scandal. His plan was for him to step down and if he was arrested the vice president which would then be the vice president would pardon him. Also, if he didn't resign he'd likely be impeached anyway.
Hernan Cortez destroyed the Aztec Empire.
The term C. Mormons refers to the members of a church that was founded by Joseph Smith, and was later succeeded by Brigham Young.