The question of “illegitimate” Presidents is nothing new in American history.
Any President who has failed to win the popular vote (5), and any President who has failed to win a majority of the total popular vote (11 with 3 two times), due to more than two candidates in the race, has been seen by opponents as “illegitimate”
So we have John Quincy Adams, Rutherford B. Hayes, Benjamin Harrison, George W. Bush the first time, and Donald Trump that fit into the first category mentioned above.
We also have James K. Polk, Zachary Taylor, James Buchanan, Abraham Lincoln, James A. Garfield, Grover Cleveland twice, Woodrow Wilson twice, Harry Truman, John F. Kennedy, Richard Nixon the first time, and Bill Clinton twice, who fit into the second category mentioned above.
So 19 times out of a total of 58 national elections for President, or one third of the time, we have had Presidents who did not have a majority of the voters behind them!
And 16 Presidents out of 43, nearly 40 percent, have not won the majority of the popular vote!
And then we have Barack Obama, who won a majority of the popular vote twice, but has had constant attacks that he is “illegitimate” based on a “Birther” theory that he was not born in the Unites States.
This issue of “illegitimacy” is rampant right now regarding Donald Trump, because he lost the popular vote by nearly 3 million, much larger than the other four popular vote losers who won the Electoral College, and civil rights icon John Lewis, Georgia Congressman, has said, rightfully, that he sees Trump as “illegitimate” and will not attend Trump’s inauguration next Friday.
Since Trump led those who said Barack Obama was “illegitimate”, appropriate that John Lewis take the stand he has, and there is an old saying” “What is good for the goose is good for the gander”, and also “What goes around comes around”!