Trump and Trump, Jr. blasted for joking about genocide in attacks on Democratic 2020 presidential candidate
Donald Trump wearing a red 'Make America Great Again' at a political rally in Arizona, photo by Gage Skidmore.

President Donald Trump was highly criticized on Saturday for making an apparent joke about genocide during political attack on a 2020 campaign challenger.

On Saturday, Sen. Elizabeth Warren (D-MA) announced she was running for the highest office in the land.

Trump, who has nicknamed Warren "Pocohontas" over her claims of Native American heritage, blasted the Massachusetts Democrat on Twitter.

Trump's all-caps reference to "trail" was widely taken as a reference to the "trail of tears" -- the forced relocation of Native Americans following the passage of the 1830 Indian Removal Act.

Thousands of Native Americans died.

Donald Trump, Jr. even shared an image on Instagram saying, "the Native American genocide continues with another murder by the president."

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Savage!!! Love my President.

A post shared by Donald Trump Jr. (@donaldjtrumpjr) on

Here are some of the criticism of the commander-in-chief: