Final answer:
The winner-take-all rule of the Electoral College is a system in which the candidate who wins the most votes in a state receives all of that state's electoral votes. This rule is used by forty-eight states and the District of Columbia.
Step-by-step explanation:
The winner-take-all rule of the Electoral College is a system in which the candidate who wins the most votes in a state receives all of that state's electoral votes. This system is used by forty-eight states and the District of Columbia. In these states, the candidate who receives the most votes, even if it is by a small margin, is awarded all of the state's electoral votes. However, there are two exceptions to this rule - Nebraska and Maine - where the electoral votes are divided based on the winner of each congressional district and the winner of the statewide vote.