“THE conception of political equality from the Declaration of Independence, to Lincoln’s Gettysburg Address, to the Fifteenth, Seventeenth and Nineteenth Amendments can mean only one thing — one person, one vote,” the Supreme Court ruled almost a half-century ago. Yet the framers of the Constitution made this aspiration impossible, then and now.

Under the Constitution, electoral votes are apportioned to states according to the total number of senators and representatives from each state. So even the smallest states, regardless of their population, get at least three electoral votes.

But there is a second, less obvious distortion to the “one person, one vote” principle. Seats in the House of Representatives are apportioned according to the number of residents in a given state, not the number of eligible voters. And many residents — children, noncitizens and, in many states, prisoners and felons — do not have the right to vote.