Omarosa says ‘the end of Donald Trump’ will occur if his personal assistant is called to testify before Congress
Omarosa Manigault Newman on MSNBC (screengrab)

Longtime Donald Trump advisor Omarosa Manigault Newman predicted that public Congressional testimony by Donald Trump's personal assistant would end his administration.

Manigault Newman appeared on MSNBC's "Hardball" on Tuesday.

The host played a clip of HUD Secretary Ben Carson, "the lone African-American in the president's cabinet," defending Trump after Michael Cohen testified under oath that the president is a racist.

"President Trump has been called out for the lack of diversity, of course, in his administration," Matthews noted. "There's the administration, there's the picture, it's kind of monochromatic, isn't it?"

[caption id="attachment_1458930" align="aligncenter" width="640"] MSNBC 'Trump's White House' graphic (screengrab)[/caption]

Manigault Newman joined Matthews for analysis.

"I don't think there's a question of whether he's a bigot or racist, the question is how is it impacting his ability to fulfill the duties of the presidency," she explained. "He's proven time and time again that he does not treat people who do not look like him the same."

The host directed the conversation to the public testimony by longtime Trump "fixer" Michael Cohen.

"Let me ask you about who the president got to worry about," Matthews aid. "Who do you think Trump fears most?"

"Rhona Graff, she's his personal secretary," she replied.

"She knows everyone," she explained. "She knows the role they play, knows who knows who said what, when. She set up the meetings."

"If she is called to testify, that will be the end of Donald Trump," Manigault Newman predicted.

Matthews asked what scares Trump.

"I think he's afraid of failure," she replied. "And he knows once he's impeached, that will be the most significant sign that he is truly a failure and that he has been running the biggest, greatest -- and perpetuating the greatest fraud on the American people because he was not able, capable or prepared to be president of the United States."

"Is Trump a guy who basically has a problem with people of color? Or does he just know he can get votes by playing that card?" Matthews asked.

"He has a problem with people of color. There were years that I denied that because I was in his orbit, but he exploits them," she admitted.