President Donald Trump's administration has revoked the visa of a Nigerian Nobel laureate after he compared Trump to a brutal dictator, according to a new report. The Guardian reported on Tuesday that the Trump administration revoked the visa of Wole Soyinka, who won the Nobel Prize for literature in 1986. Soyinga had previously held permanent residency in the U.S. until he destroyed his green card in protest of Trump's first term, according to the report. "I want to assure the consulate ... that I'm very content with the revocation of my visa," Soyinka told the outlet. Soyinka had previously compared Trump to the Ugandan dictator Idi Amin, who is estimated to have killed as many as 500,000 people during his regime. The writer speculated that the comparison "might have struck a nerve and contributed to the US consulate's decision," according to the report.