Why did thomas jefferson receive the amount of criticism that he did over the purchase? (louisiana purchase)

He received a lot of criticism over the Louisiana Purchase for several reasons. Jefferson believed that the president only had the power that the constitution gave him. Since the Constitution doesn't give the president the power to buy land, people considered his purchase to be unconstitutional and hypocritical. While this is the primary reason for criticism, there were a couple other minor reasons. Many federalists believed that buying land from France would jeopardize a much wanted alliance with Britain. Also there were already people living in this territory so it was a large debate about whether or not to grant them citizenship. 

Cuz he bought it from the french and the federalist said that was not consitutional.

After the American Civil War ended in 1865, the U.S. had to go through some changes. This would be known as post-Civil war era or Reconstruction. One major shift in the U.S. was the 13th, 14th, and 15th amendment. After the 19th century was over, 100 years from 1865 which leads up to 1965 there will be a major shift in the south and for racial discrimination. Second shift was Voting Rights of 1965.