Katrina Pierson, an adviser to President Trump’s 2020 campaign, deflected a question about diversity in the White House by asking how many black people served in the Lincoln administration.

“I’m not going to participate in the attempt to make this all about race. It is ridiculous,” Pierson told the Rev. Al Sharpton during an interview Saturday on MSNBC. “How many black people were in Abraham Lincoln’s West Wing?”

“If you’ve got to go back to Abe Lincoln you really need to shop it,” Sharpton replied.

The intense exchange erupted after Sharpton asked her how many African-American people work inside the White House during a discussion about reparations and Pierson, who is black, took exception.

“Everything has to be made about race, reverend … I’m not going to participate if you’re going to continue to paint this president as racist,” she said.

Sharpton questioned Pierson on how Trump can appeal to black voters if he doesn’t hire African-Americans to work in his White House.

“There’s plenty of black people working in the White House,” she said.