I'm 100% white so the fact you said there are no 'pure-bred' americans left is pretty fucking stupid

there is no part of my racial background family history that doesn't come from white English ancestry although one of my family last names can be potentially traced back to Germany, and, even if you have a far along white ancestor, if the percentage drops to lower than 1% then you have virtually no white blood in you and it will continue to disintegrate until absolutely zero of all of your genes contain white skinned DNA.

But that's just the genetic anatomy of it. So having white in your lineage, unless relatively recent, doesn't mean shit.

For Obama, it's just however old he is ago. That isn't very long. White momma Black poppa. Too bad bitch.