Trump 2020 campaign adviser Katrina Pierson on Sunday dismissed a question about diversity within President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's administration by asking how many black people worked in former President Lincoln's administration.

"I’m not going to participate in the attempt to make this all about race. It's ridiculous," Pierson, who is African-American, said during an appearance on MSNBC. "How many black people were in Abraham Lincoln’s West Wing?”

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Pierson invoked Lincoln after Rev. Al Sharpton pressed her on how many black people work inside the White House. The question led to a heated exchange, with Pierson accusing Sharpton of attempting to paint the president as a racist.

"Everything has to be made about race, reverend. ... I’m not going to participate in the attempt to continue to paint this president as racist," Pierson said.

Sharpton then asked how Trump can appeal to black voters without hiring African-Americans within his administration. Pierson replied that there are "plenty of black people working in the West Wing" before bringing up the lack of diversity inside Lincoln's White House.

"Is Abraham Lincoln a racist because he didn't have a black person in his West Wing? This is insane. It's an insane discussion," Pierson added.

Activist David Brock later remarked that the lack of diversity inside the White House is a stark contrast to the diverse batch of Democratic candidates running for president in 2020.

Trump has faced widespread scrutiny from Democrats on issues related to race since he launched his 2016 campaign. Several 2020 presidential candidates, including Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.) and Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.), have labeled the president a racist.

In March 2018, many on social media criticized the lack of diversity among White House interns after the administration released a photo of the mostly white class.