Nobel Prize-winning author Wole Soyinka said on Tuesday that his non-resident visa to enter the United States had been rejected, adding that he believes it may be because he recently criticized President Donald Trump.

The Nigerian author, 91, won the Nobel Prize in Literature in 1986, becoming the first African to do so.

Speaking to the press on Tuesday, Soyinka said he believed it had little to do with him and was instead a product of the United States’ immigration policies. He said he was told to reapply if he wished to enter again.

“It’s not about me, I’m not really interested in going back to the United States,” he said. “But a principle is involved. Human beings deserve to be treated decently wherever they are.”

Soyinka, who has taught in the U.S. and previously held a green card, joked on Tuesday that his green card “had an accident” eight years ago and “fell between a pair of scissors.” In 2017, he destroyed his green card in protest over Trump’s first inauguration.

The letter he received informing him of his visa revocation cites “additional information became available after the visa was issued,” as the reason for its revocation, but does not describe what that information was.

Soyinka believes it may be because he recently referred to Trump as a “white version of Idi Amin,” a reference to the dictator who ruled Uganda from 1971 until 1979.

He jokingly referred to his rejection as a “love letter” and said that while he did not blame the officials, he would not be applying for another visa.

“I have no visa. I am banned, obviously, from the United States, and if you want to see me, you know where to find me.”

The U.S. Consulate in Nigeria’s commercial hub, Lagos, directed all questions to the State Department in Washington, D.C. Through a spokesperson, it said that because under US law visa records are generally confidential, they would not discuss the specifics of this case while stressing that “visas are a privilege, not a right” and that “visas may be revoked at any time, at the discretion of the U.S. government, whenever circumstances warrant.”

What can we all learn from stories of men trying to find friends…and failing?

Men in real life – and in the movies – are trying to figure out how to be friends. There’s been a lot of talk alleging lonely men are the cause of cultural tensions, and Hollywood has caught on (despite a similar number of women saying they are lonely, too!). Several films this year depict how society leads men into fraught, messy friendships. So, what can we all learn from toxic (or good!) friendships between men?

Brittany is joined by NPR arts and culture reporter Neda Ulaby and IndieWire awards editor Marcus Jones to dig into it.

Follow Brittany Luse on Instagram: @bmluse

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This episode was produced by Corey Antonio Rose. It was edited by Neena Pathak. Our Supervising Producer is Barton Girdwood. Our Executive Producer is Veralyn Williams. Our VP of Programming is Yolanda Sangweni.