Director Spike Lee wore a shirt reading “God Protect Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE” during an interview with CNN on Friday.

The Academy Award-nominated director has been widely critical of President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, refusing to call him by name and instead using the name “Agent Orange.” Mueller is investigating Russian interference in the 2016 presidential election. He is also probing whether the Trump campaign colluded with Russia and whether Trump has obstructed justice.

Lee told CNN’s Anderson Cooper on Thursday that Trump has given the “green light” to racists in the U.S.

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"Since [Trump] has gotten into the White House it is not even a dog whistle, it's a bullhorn," Lee said. "We've seen a rise to the right. It's not just America, it's worldwide."

The director also said he would turn down an opportunity to sit down with Trump.

Lee said his new movie ”BlacKkKlansman,” which depicts the true story of how black detective Ron Stallworth was able to infiltrate the Ku Klux Klan, is intentionally being released just ahead of the anniversary of the deadly white supremacist rally in Charlottesville, Va.

"The president of the United States had a chance to denounce hate," Lee said. "The whole world saw what happened and he didn't do it."

Trump faced widespread criticism for his response to the white supremacist rally last year, during which he placed blame on "both sides" for the violence that broke out at the rally.

One woman, Heather Heyer, was killed when a man drove his car into a crowd of counterprotesters at the rally. The suspect, James Fields, was later charged with federal hate crimes.