But Trump's use of the slur during an event meant to honor Native Americans, in the Oval Office of the White House, was unprecedented.
During an event at the White House Monday afternoon honoring the last remaining Navajo Code Talkers from World War II, President Trump thanked Native Americans dedicated to their country and praised them for their service.
Trump told the veterans "you were here long before any of us were here".
Addressing her guest, U.S. News and World Report's David Catanese, Baldwin said, "Come join me in the conversation here".
"You were here long before any of us were here", Trump told Code Talkers during the event.
The president has repeatedly mocked the MA senator for claims she made about being part Native American.
If you watch the clip, note the silence in the room after Trump made his quip targeting Sen. Native American code talking became more reliable than Morse code in the war, notably aiding US efforts in the Battle of Iwo Jima.
USA military officials in World I and World War II recruited Native Americans and used codes based on their languages.
Trump has repeatedly referred to Warren as "Pocahontas". "Warren was very offensive when she lied about something specifically to advance her career", said Sanders. "Warren lying about her heritage", she said.
And third, I realize that the president has a creepy preoccupation with Elizabeth Warren, but his near-constant references "Pocahontas" is plainly insulting.
'These are my family stories. She had no proof for the claim, which then-Sen. "I think she's a racist, actually, because what she did was very racist". "They call her Pocahontas".
During her Senate campaign in 2012, Warren was dogged by questions about listing herself as a minority in past professional directories.
The controversial act allowed white settlers to drive Native Americans out of fertile farmlands in Georgia, Alabama, North Carolina and Florida that they had lived on for generations because the government reasoned that white men needed the land to grow cotton.