What happened in Vegas? Who won, who lost and takeaways from the Democratic debate-politico: It took less than five minutes for Elizabeth Warren to set the tone for Wednesday’s debate. She leapt into the middle of a Bernie Sanders-Michael Bloomberg tiff over electability to denounce Bloomberg’s treatment of women, stirring waves of applause in the debate hall, and setting off a rollicking two hours when the Democratic presidential candidates finally said what they really think about each other.