> 1. 300 million people are not registered voters. ~50-60 million are.
Each candidate of two in 2016 USA presidential elections got approximately as many votes. So total number of voted - not registered to vote - is twice as much.
Donald J. Trump Republican 62,980,160
Hillary R. Clinton Democratic 65,845,063
Gary Johnson Libertarian 4,488,931
Jill Stein Green 1,457,050
Evan McMullin Independent 728,830
2000 popular vote, President:
George W. Bush Republican 50,456,002
Al Gore Democratic 50,999,897
Ralph Nader Green 2,882,955
Patrick J. Buchanan Reform 448,895
Harry Browne Libertarian 384,431
Howard Phillips Constitution 98,020
If the US had either a popular vote system or a ranked vote system state by state, the outcome would have been different. Nader had more votes in Florida than the difference between Bush and Gore.
Devil's advocate (I'm not even American): would the parties' results have been the opposite and the same people that support popular vote would still insist on it?
Or with different words: if you were living in a state with low density, would you still think that strict popular vote is fair?
Each candidate of two in 2016 USA presidential elections got approximately as many votes. So total number of voted - not registered to vote - is twice as much.