Limbaugh: For Democrats, You Can't Be An “Authentic Black” Unless You Have “Slave Blood” Written by Media Matters Staff Published 07/31/12 1:39 PM EDT From the July 31 edition of Premiere Radio Networks' The Rush Limbaugh Show: Video file Related: Obama has slavery ties through his mother's family line, Ancestry.com says Previously: Limbaugh: Why Was Michelle Obama Not At Byrd's Funeral? Because Of Her “Authentic Slave Blood”? “We Can Only Speculate”