President Barack Obama has been elected twice by a coalition that reflects the diversity of America. Republicans have struggled to win with ever-higher percentages of the shrinking share of the population that is white men — "a Mad Men party in a Modern Family world," in the words of one strategist.

But at America's founding, only white men could vote, and the franchise has only slowly expanded to include people of color, women, and — during the Vietnam War — people under 21. These maps show how American politics would have looked in that undemocratic past.