Sen. Elizabeth Warren (D-Mass.) railed against President Trump for using a "racial slur" after he cracked a "Pocahontas" joke during a Monday event with Native American veterans. "It is deeply unfortunate that the president of the United States cannot even make it through a ceremony honoring these heroes without having to throw out a racial slur," Warren said in an interview on MSNBC after Trump referred to her as "Pocahontas" at an event honoring Navaho "code talkers" who served in World War II. [Snip] Warren in her response said Trump's joke will not stop her from continuing to criticize him....