On Thursday, an email sent by President Donald Trump’s Chief of Staff John Kelly in which he mocked Sen. Elizabeth Warren (D-MA).

MSNBC’s Lawrence O’Donnell took on Trump’s top lieutenant, saying it was “almost impossible” to tell the two men apart.

O’Donnell called Kelly Trump’s “flunky-in-chief.”

“John Kelly is the White House official who’s conduct is as despicable as Donald Trump’s,” he said. “Not as frequently despicable, but frequent enough.”

O’Donnell talked about Kelley’s upbringing in a racist neighborhood of Boston and went through past examples of his racism and sexism.

Then he discussed the ways in which Kelly mirrors his boss’ worst characteristics.

“John Kelly is Donald Trump,” he said.

Watch below.