Answer and Explanation:
Yes, there were some negatives regarding the Louisiana Purchase of 1803. For example, Jefferson made a controversial decision that effectively doubled the territory of the United States while transgressing his own views of proper presidential authority. 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 unconstitutional1. The Federalists opposed the purchase for several reasons, chief among them the likelihood that new slave states would enter the Union from the southern parts of the territory.