once again, mr. neral secretary i want to extend to you and all of those who labored hard for this moment my warmest personal thanks. america on sunday at four clock p.m.. today on the civil war, clemson university history professor talks about the origins of the 14th amendment and why it was necessary to gratify it after the south's defeat and the abolition of slavery. here is a preview. >> freedom is a powerful engine. african americans begin defining their lives with new freedom, getting married, searching for members of their family. defert slavery did not any positive right. it only liberated them from the ownership of a master and eliminated the motive for self in a rented -- interested but never less -- benevolence. what ever meaning the 13th thedment may have had, white south's reaction to slavery change the dynamic. they visibly enacted thinly disguised versions of slavery known as a black codes which righthite employers the to administer corporate chastisement, meaning whipping. most states becam

mr. horowitz: i haven't gone back and read the letter. i think it's a straightforward comparison that could be made about it. i'll leave it at that. senator cornyn: looks like you validated what dipty attorney neral rosenstein said in his memorandum. mr. horowitz: i wouldn't dispute it. senator cornyn: i think what is so disturbing, there seemed to be a culture of impunity where the rules did not apply to the direct tore and his leadership team, but obviously were designed to apply to everybody else. i believe with director wray when he talks about rank and file f.b.i. professionals. we are talking about a group that somehow went terribly awry in the leadership team of director comey. general who areo -- hooro witnesses, you said you found no bias in the investigation and you qualify that by documentary and testimonial evidence. are you discounting the text messages from mr. strzok and ms. page, for example? mr. horowitz: what we were rying to do is we were focused on the very specific investigative decisions we looked at and what was significant about -- now talking about the pre-july announcement decisions was that strzok, page and others were not the sole decision makers there but team decisio