As rumors mounted of potential VP choices for the Democrats, Donald Trump again took to Twitter, posting Friday morning that he’s in favor of Elizabeth Warren sharing the ticket with Hillary Clinton: “Pocahontas is at it again! Goofy Elizabeth Warren, one of the least productive U.S. Senators, has a nasty mouth. Hope she is V.P. choice.” Warren officially endorsed Clinton on Thursday night, saying “I’m ready to jump in this fight and make sure that Hillary Clinton is the next president of the United States and be sure that Donald Trump gets nowhere near the White House.” Ahead of her planned endorsement of the presumptive Democratic nominee, Warren condemned presumptive Republican nominee Trump in a speech in Washington, D.C. In what was perhaps her harshest attack on Trump yet, Warren assailed the Republican candidate for his recent attacks on a judge presiding over litigation pertaining to Trump University. “What would you expect from a thin-skinned racist bully?” she asked. In an interview with MSNBC’s Rachel Maddow, Warren declared that she is ready to be Hillary’s running mate, if asked.