Question

Why did some US politicians believe that the Louisiana Purchase went against the US Constitution?

Answer 1

Although the purchase was thought of by some as unjust and unconstitutional, Jefferson determined that his constitutional power to negotiate treaties allowed the purchase of what became fifteen states. In hindsight, the Louisiana Purchase could be considered one of his greatest contributions to the United States.

Step-by-step explanation:

Answer 2

Thomas Jefferson didn't consult with Congress before deciding to buy the Louisiana Purchase