Because it promised equal rights and protection to all citizens
He was from the South, and Southerners thought he should support their cause. ... It created a dividing line between free and slave states???
1. The Massachussett congressman believes that the Indians have all the right to stay on their own lands, and that the settlers have little to no rights of taking the land from the Native Americans. He also states that there were plentiful land in which they already have to accomadate all the people, and they should allow the Native Americans to continue living in their own lands, & the citizens should be thankful for what they already have.
2. To keep the US from passing the expansion, because he finds that there is no need for it at all.
3.The US was deciding on whether they should expand westward or not (this would lead to the Lewis & Clark Expedition)
hope this helps
Answer:
Mexico also agreed to sell its New Mexico and Upper California territories to the United States at a price of $15 million. The treaty effectively halved the size of Mexico and doubled the territory of the United States. This territorial exchange had long-term effects on both nations
