During the 19th century, America had a strong reluctance to become involved in other countries alliances and affairs. Isolationists in America argued that the US had a different philosophy than European countries and the US should defend freedom and democracy by not being involved in such things.
During the Spanish-American War, the US remained isolated and the country fought the war without alliances and without fighting in Europe. But the mindset started to change since the motto of freedom and democracy was substituted by the US bringing an empire in the Caribbean and in the Pacific - the US had influence in the Phillippines, Puerto Rico and Guam -.
President Roosevelt had the big stick policy, he believed that the US should export its values and become a global power. At the same time, he defended that the US should avoid conflicts. President Roosevelt ended the isolationism in the US and started the modern American philosophy of acting aggressively in foreign affairs even without the support of the Congress.
To finish the Louisiana Purchase, Jefferson needed to set aside the principles that he upheld. This is because the transaction that he was about to deal with were not states in the constitution. If he waited for amendments, the deal would have failed. However, he received full support from the Americans, and he went through with the purchase deal.
He therefore needed to take quick action since he realized that Spain had also signed a secret treaty to cede with France. This is the reason why the French government threatened America.
Answer:
The Spanish, French, and English monarchs
Explanation:
