USA HISTORY

Detailed explanation-1: -The Louisiana Purchase eventually doubled the size of the United States, greatly strengthened the country materially and strategically, provided a powerful impetus to westward expansion, and confirmed the doctrine of implied powers of the federal Constitution.

Detailed explanation-2: -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-3: -While president, Jefferson successfully acquired the Louisiana Territory from France in 1803 and sent the Lewis and Clark Expedition (1803–1806) on a mapping and scientific exploration up the Missouri River to the Pacific.

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. But Napoleon was becoming impatient and threatened to void the treaty.