Which of these is not an official source of Public International Law?

What was President Clinton's political misstep that set the stage for a Republican Party resurgence?

A) dropping opposition to the death penalty B) facilitating free trade C) promising a middle-class tax cut D) emphasizing socially liberal policies on abortion and gays in the military E) ignoring congressional balanced budget initiatives

What did the Fifteenth Amendment do?

a. guaranteed free black men the right to vote b. established a literacy test for voting c. guaranteed all persons the equal protection of the laws d. guaranteed women the right to vote