Trump knows nothing about history and just wants to get 'bar room' laughs on Twitter: presidential historian

On Monday, presidential historian Douglas Brinkley slammed President Donald Trump for having little knowledge on after he tweeted insults about the trail of tears.

In response to Sen. Elizabeth Warren's (D-MA) announcement that she is running for president, Trump tweeted, "See you on the campaign TRAIL, Liz!"

Trump has mocked Warren's claim that she is part Native American by nicknaming her "Pocahontas."

"Our whole country could use education history courses on the native history and particularly, how ugly and grim the trail of tears was, "Brinkley told CNN's Brooke Baldwin.

"It was insensitive and when you have the word savage from his son, it leads to that impression. Demonizing Elizabeth Warren as 'Pocahontas' constantly. He is a president that doesn't know anything about Native American history and is just trying get bar room laughs using his Twitter feed," he said.

Watch below via CNN.