Former President Donald Trump lashed out in an angry Truth Social post Thursday as Sen. Elizabeth Warren (D-MA) addressed a DNC arena packed with thousands of Vice President Kamala Harris’ supporters. Trump revisited his controversial nickname for Warren — which critics have said amounts to a racial slur — as he denigrated her speech at the Democratic National Convention in Chicago. “Pocahontas is now speaking at the DNC,” Trump wrote. “She used her fake Indian heritage to scam the system….It worked until she got caught. 10024th Indian, remember?” Want more breaking political news? Click for…