The correct answer is: somewhere around 10 years. 10 years seems to be the average with some justices serving for shorter terms and some serving for longer terms.
During Bush's second term, the great recession hit, making the American economy very unstable. The unsteadiness of the economy stopped foreign investors from investing in American stock because they were uncertain if they would make their money back. For that reason, the international support of the United States dropped.
Spain owned the territory