Article II of the Constitution gives states broad authority to decide how their electoral votes are selected and divided among the candidates. In 48 states, the candidate who gets the most votes wins all of the state’s electoral votes. But the Constitution doesn’t require that rule. Maine and Nebraska have implemented district- by-district voting. One electoral vote goes to the winner in each congressional district, and the remaining two electoral votes are awarded to the winner of the statewide popular vote. Assume, however, that a state enacts a law giving all its electoral votes to the presidential candidate who wins...