Tenn. Code Ann. § 2-15-101: Selection of presidential electors

At the regular November election immediately preceding the time fixed by the law of the United States for the choice of president and vice president, as many electors of president and vice president as this state may be entitled to shall be elected. Each registered voter in this state may vote for the whole number of electors. The persons, up to the number required to be chosen, having the highest number of votes shall be declared to be duly chosen electors.