One of the problems with the “one drop” rule, that racist idea that one drop of black blood makes a person black, which one of those still accepted beliefs here in America, at least to many, is that if you apply it fully, it may turn out everybody is black. After all, wouldn’t that simply be a question of how far back you want to go.
Several scholars are now saying Barack Obama may not, according to the one drop mindset, be our first African-American President. Look out! This may cause some people great consternation.
Andrew Jackson, Abraham Lincoln, Warren Harding, Calvin Coolidge, Dwight D. Eisenhower, and ole Thomas Jefferson all may have had blacks in their genealogy.
Well, well, well.
Of course I don’t buy into the one drop rule. But this goes to show, defining people by what they look like or what is in their ancestry is all just a wasted exercise. We are all mixed somewhere down the line.
Read more about these other “black” Presidents here.

Black people created all people.