); see also id. at 548 (Appellant???s Opening Brief, Puishes v. Mann, No. 25-401 (9th Cir.)); Hearings 1968, supra note 167, at 9 (Sen. Tydings stating ???the age of eighteen???the age of high school graduation??? marked the time when citizens were prepared to vote); id. at 36 (Sen. Pearson testifying that the age young people generally graduate from high school is the best place to start the vote