Trump uses historic Native American massacre to mock 2020 opponent Elizabeth WarrenDonald Trump faces a backlash after once again mocking 2020 presidential candidate Elizabeth Warren, with a joke referencing one of the worst massacres of Native Americans in US history. During a series of controversial late-night tweets, the president taunted one of the first major Democrats to enter the upcoming race for the White House by referring to the Wounded Knee massacre, duing which hundreds of Sioux Indians were killed at the hands of US soldiers. Mr Trump posted a recent video Ms Warren shared online in which she drinks a beer in her kitchen shortly after announcing her intention to run in 2020.