Today, the White House hosted Navajo Code Talkers who served bravely in World War II. During his turn at the podium set up in the Oval Office, President Donald Trump stood in front of a portrait of President Andrew Jackson—who famously signed the Indian Removal Act in 1830, touching off the deadly Trail of Tears—and made a joke about Senator Elizabeth Warren (D-Mass.), who claims Native American ancestry.

“You were here long before any of us were here,” Trump said. “Although, we have a representative in Congress who they say was here a long time ago. They call her Pocahontas.” He has used the nickname for Warren since his time on the campaign trail.

Warren responded to the comments on MSNBC, saying, “It is deeply unfortunate that the president of the United States cannot even make it through a ceremony honoring these heroes without having to throw out a racial slur.”