How did President Jefferson and Congress work together to send representatives to negotiate a treaty with France and Spain?

On October 20, 1803, the Senate approved for ratification a treaty with France by which the United States purchased the Louisiana Territory. ... Jefferson instructed the American minister in Paris to try to purchase the city of New Orleans and the Florida Panhandle, for which Congress had appropriated $2 million.

we can argue that appeasement caused world war ii because it allowed hitler and the nazis to build germany’s military power until it was strong enough to fight a major war. additionally, appeasement emboldened germany, making it think the allies would never have the will to fight. this made germany much more aggressive and encouraged it to take the steps that eventually led to war.