The head of the NAACP warned that there will be more instances of racially charged violence like that in Charlottesville, Va., because of a hostile environment created by President Trump.

“There will be many Charlottesvilles,” NAACP interim President and CEO Derrick Johnson said at a speech at the National Press Club Tuesday, USA Today reported.

Johnson blamed the Trump administration for creating an environment that leads to the violence that broke out at the white supremacist rally in Charlottesville. One woman was killed and more than a dozen others injured after a man with alleged white supremacist connections drove his car into a crowd of anti-racist protesters at the event.

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“We are in trying times,” Johnson said. “Unfortunately this administration has created a climate where … [hate groups] feel comfortable to walk in public without the hoods anymore.”

Critics of Trump have blamed him for creating a hateful environment with his rhetoric on the campaign trail and by calling for divisive policies like building a wall on the Mexican border.

Trump also came under fire for condemning “both sides” for the violence in Charlottesville and initially refusing to single out white supremacists in his statements.

Johnson also called for Confederate statues to be removed from public spaces, a debate that has reignited since Charlottesville. The white supremacist rally was held to protest the removal of a Confederate statue there.

“We believe people have the right to have monuments, but it should not be financed by public dollars on public display,” Johnson said. “It’s OK to relocate them in a museum or a cemetery. I prefer cemetery.”

Cities across the country have since removed or covered up their Confederate statues, including Charlottesville, which covered its statue of Gen. Robert E. Lee with a black tarp last week.