Donald Trump’s campaign fired back Thursday at a new Hillary Clinton video that portrayed the Republican nominee as backed by white supremacists and the Ku Klux Klan -- with a surrogate calling the video "revolting." 

The web video was tweeted out from Clinton’s Twitter account with the message: “There's a reason the most hateful fringe of the right wing is supporting Donald Trump.":

The video shows white supremacists endorsing Trump and specifically his policies on immigration.

“Voting against Donald Trump at this point is treason to your heritage,” former KKK Grand Wizard David Duke says in the video. 

Trump’s campaign called it a “disgusting new low.”

“This type of rhetoric and repulsive advertising is revolting and completely beyond the pale,” Pastor Mark Burns, a televangelist and prominent black supporter of Trump, said in a statement.

Burns went on to call for Clinton to immediately disavow the video: “I call on Hillary Clinton to disavow this video and her campaign for this sickening act that has no place in our world."  

Clinton plans to hammer Trump in a speech later Thursday and tie him to the so-called alt-right movement. In the video, a commentator calls that movement a “dressed-up-in-suits version of the neo-Nazi and white supremacist movements.”