RACHEL MADDOW (CO-HOST): One thing that's getting a lot of traction on social media is the response to Donald Trump's speech from David Duke, the former Klan leader who is thinking about running for congress again or running for some elected office again. He says “Great Trump Speech, America First! Stop Wars! Defeat the Corrupt elites! Protect our Borders!, Fair Trade! Couldn't have said it better!” Meaning couldn't have said it better myself. And a lot of people who I think are critical of Donald Trump generally look at praise like that from somebody like Donald [sic] Duke and wonder if he is a gateway drug, if there is something beyond Donald Trump himself, that means a much greater transformation of the Republican Party into something that is going to be new to mainstream politics. 

Previously:

MSNBC's Eugene Robinson: Trump's RNC Speech Was “A Message ... To White America: Be Afraid. I Will Protect You”

“RNC Contact” Gave White Supremacist And Virulent Misogynist A Convention Pass

O'Reilly: Election Will Pit “Whites Against Minorities” Because “White Voters Feel Aggrieved” At Obama