Congress
The house of representative and senate are tasked by the constitution to debate and approve all government spending in the spirit of checks and balances as enhanced by the principle of separation of power.
I think it's the Pacific Ocean
Answer:
The statement that contradicts the thesis is
D) A return to isolationism and impartiality at the beginning of World War 1
Although this did not necessarily happen because of lack of power, opting for isolationism during a world war does reduce the perceived power both people in America and abroad have about the country.