The Whig Party were a group that believed that Jackson ruled like a king. They blamed Van Buren during the Panic of 1837 and in 1840 William Henry Harrison won the presidency.
It was their neutrality. They were still in the process of building a country. Setting up laws and meeting the needs of the people were their primary concerns. As much as possible, they avoided conflict as much as they could.
It was because Jamestown Enslaved, Took land, and stole from Powhatan and his people.