USA HISTORY

Detailed explanation-1: -It was deemed controversial because Jefferson was a strict constructionist of the Constitution and the Constitution does not explicitly state that the president or Congress could purchase foreign land. Many thought he was being a hypocrite.

Detailed explanation-2: -Jefferson adhered to a strict interpretation of the Constitution and believed that without a specific enumeration of his right as president to acquire the purchase, buying the Louisiana Territory could plausibly be unconstitutional.

Detailed explanation-3: -Jefferson drafted an amendment that would authorize the purchase of Louisiana retroactively. But Jefferson’s cabinet members argued against the need for an amendment, and Congress disregarded his draft. The Senate ratified the treaty in October of 1803.

Detailed explanation-4: -Jefferson also worried about the constitutionality of the acquisition, for the Constitution did not specifically grant the federal government the authority to acquire more territory, and he considered an amendment to the Constitution.