John Legend called Donald Trump a “cancer” who needs to be removed from office after he asked Navy Secretary Richard Spencer to resign.

Legend tweeted out Spencer’s resignation letter, in which he explained how he was asked to quit by Trump because the two don’t see eye to eye on what is meant by “good order and discipline,” according to Newsweek.

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“The President is a cancer and needs to be removed from office as soon as possible,” Legend tweeted.

In a separate Tweet, Legend adds: “’In July Mr. Trump said that the Constitution gives him ‘the right to do whatever I want.’ Those are the words of a despot, not an American president.”

Spencer was asked to resign by Trump due to how he handled the Navy Seal Edward Gallagher case, in addition to “large cost overruns from past administration’s contracting procedures,” Newsweek reported.

In his letter, Spencer also expressed that he’s resigning because he cannot “in good conscience obey an order that I believe violates the sacred oath I took.”

“The rule of law is what sets us apart from our adversaries. Good order and discipline is what has enabled our victory against foreign tyranny time and again. The constitution and the uniform code of military justice are the shields that set us apart, and the beacons that protect us all. I have strived to ensure our proceedings are fair, transparent and consistent, from the newest recruit to the flag and general officer level. Unfortunately, it has become apparent that in this respect I no longer share the same understanding with the commander in chief who appointed me,” Spencer added.

Defense Secretary Mark Esper said Spencer violated his “trust and confidence” for having secret talks with the White House about reinstating Gallagher’s initial rank, Newsweek reported.

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Gallagher, a Chief Petty Officer, was charged with war crimes in Iraq, for which he was ultimately acquitted; however, he was convicted of posing with the corpse of a foreign prisoner and demoted to petty officer first class as a result. He faces a disciplinary review.

Trump later reinstated Gallagher back to chief petty officer, which sparked tensions between Trump and the Pentagon.

Can we throw the whole Trump White House away?