I don’t know about blanks, but he is right. White birthrates are too low and in the long haul, whites will be out-numbered because of this. I don’t know what the black birthrate is, but the Latinos are significantly higher than the whites.
Except that black abortions tend to even things out.
This might help fill in some gaps: http://anepigone.blogspot.com/2011/11/white-black-and-hispanic-birth-rates-by.html
I wonder what will happen then? Buy guns maybe?