Why did president thomas jefferson want the united states to buy new orleans and western florida from the french?

 In 1802, U.S. President Thomas Jefferson wanted to purchase New Orleans. The city of New Orleans controlled the Mississippi River, which was already important for shipping goods to and from the parts of the USA west of the Appalachian Mountains. Through Pinckney's Treaty with Spain, American merchants had "right of deposit" in New Orleans, meaning they could use the port for their goods. Napoléon Bonaparte returned Louisiana to French control from Spain (Louisiana had been a colony of Spain since 1762). Americans were fearful that they would lose their rights of use to New Orleans. The Jefferson administration decided that the best way to assure long term access to the Mississippi would be to purchase the city of New Orleans and the nearby portions of Louisiana east of the Mississippi. Jefferson sent James Monroe and Robert R. Livingston to Paris to negotiate such a purchase.

President Thomas Jefferson wanted the United States to buy the New Orleans and Western Florida from the French in order to secure trading routes for the the United States of America.