"This was supposed to be an event to honour heroes, people who put it all on the line for our country", she said.
"You were here long before any of us were here - although we have a representative in Congress who they say was here a long time ago".
The president has repeatedly mocked the MA senator for claims she made about being part Native American.
"You might have heard that Donald Trump likes to call me 'Pocahontas.' He does it on Twitter, at rallies, and even in official White House meetings", Warren wrote her supporters in a Monday fundraising email.
Referring to the concept of Trump's words being a "racial slur", Sanders said: "I think that's a ridiculous response". "They call her 'Pocahontas'". However, Navajo Nation president Russell Begaye later sent out a statement indicating that he found Trump's quip to be insensitive and bigoted while also noting that the code talkers shouldn't be placed in the middle of his political scraps.
Genealogist Chris Child of the New England Historic Society looked into Warren's background and found a document stating that she has a great-great-great-grandmother who is Native American, which would make her 1/32 Cherokee, NPR reported.
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"Pocahontas is a real person", Begaye continued.
A former White House ethics chief has warned Donald Trump "accountability is coming" after the US President used a racial slur during an event to honour Native Americans. "You were here long before any of us were here".
On Monday President Ludwig von IFuckingHateThisManWithAllMyMight was honoring Native American "code talkers" who served in World War II, and thought that it would be amusing to call Elizabeth Warren (D-Mass) "Pocahontas" because you know, Native Americans! "But you know what, I like you because you are special". "What Trump displayed today was an embarrassment to our values and a disgraceful insult to the heroes of our history".
When asked whether it was a racial slur, Sanders said that was "ridiculous".
"I think what most people find offensive is Senator Warren lying about her heritage to advance her career".
Look, is it amusing that Warren once claimed Native American heritage?