Well after the United States of America was created by the Founding Fathers, it was a slave state, certainly not a democracy. In the U.S., women couldn't vote in national elections until 99 years ago, and racial minorities weren't functionally guaranteed voting rights until 1965 -- with some currently Republican, formerly Democratic states still struggling to keep up racial barriers.
Because of the Electoral College, U.S. citizens aren't permitted to vote for U.S. presidents directly. The number of electoral votes each state gets is based on population -- not the number of its citizens, much less citizens of voting age -- with each state receiving two electoral votes above that, regardless of population. Consequently, again population-wise, just one Wyoming citizen-voter's vote has the electoral weight of the votes of 3.6 California citizen-voters.
Nobody knows how many citizens of voting age reside in each state, the U.S. Census Bureau can only estimate that as 25,002,812 +/- 40,384 for California and 434,584 +/- 2,884 for Wyoming. (See: www.census.gov) But even if those voting-age-citizen estimates are used instead of population, just one Wyoming citizen-voter's vote has the electoral weight of the votes of 3.1 California citizen-voters.
Consequently, as far as U.S. presidential elections go, they're hardly democratic, with a small "d." This all is just one strike against the quality of U.S. democracy.
The U.S. is now ranked 25th on The Economist's democracy index behind Canada (6th) and the U.K. (14th). Not surprising, considering. It is interesting that the top-three rated democracies -- Norway, Iceland and Sweden -- are among those providing their citizens with universal health care and free tertiary education.
The WHO (World Health Organization) ranks the Canada health care system 12th and the U.S. system 24th, and PISA (Programme for International Student Assessment) ranks Canadian 15-year-olds well above their United States counterparts in all three categories: math, reading and science.
While it is a fine goal, of course, I can't imagine a thinking person believing U.S. democracy currently deserves to be ranked near the top.