Answer:
In foreign policy, the U.S. suffered from the so-called Vietnam Syndrome, which is a fear of getting involved in foreign ground wars that might become long, bloody stalemates with no foreseeable end.
The Dred Scott vase invented a constitutional right to make it so that slaves couldn’t testify in court, as they were “property” and not people.
A bird and something Else
The Truman Doctrine<span> was an American foreign policy whose stated purpose was to counter Soviet geopolitical expansion during the Cold War. It was first announced to Congress by President Harry S. </span>Truman<span>on March 12, 1947 and further developed on July 12, 1948 when he pledged to contain threats to Greece and Turkey.</span>