Sam Houston. That's why Houston is a city in Texas!
a) A doctrine allowing new states to decide the issue of slavery for themselves.
It basically gave states the power to choose whether they wanted to be free or slave states.
It makes sure that you have the right to a jury in civil cases if the amount is over $20.
True, Mormons believe that Indians come from the lost tribes of Hebrews or the lost tribes of Israel. The lost tribes were believed to came in America. Although, it was a debate whether the Indians really did come from the lost tribes, Mormons believed that it is in the scripture, the Book of Mormon. Lehi is an Israelite and Nephi's descendant Aminabi came from Jerusalem. Also, there are studies of this migration that was also pointed in the Mormon Bandwagon for more detailed explanation.
https://mormonbandwagon.com/dave/tribe-manasseh-2/