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.
Answer:
More and more land was required for the collection of natural resources, resulting in the continuing theft of land from Native Americans. More and more labor was required to work the land, resulting in a tremendous growth in slavery in the middle and southern colonies.
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In the US the Democratic party is considered liberal, while the Republican party is considered conservative.
Therefore "conservative views on issues such as gay marriage and abortion" would not be considered characteristic of the Democratic party.
Rough Riders
The most famous of all the units fighting in Cuba, the "Rough Riders" was the name given to the First U.S. Volunteer Cavalry under the leadership of Theodore Roosevelt. Roosevelt resigned his position as Assistant Secretary of the Navy in May 1898 to join the volunteer cavalry.
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