"I think the recent events with Sen. Sanders make him look more like spoiler than advocate. The Nevada business was not good for him," said Samuel Popkin, a political science professor at the University of California, San Diego, and a former consultant to the Bill Clinton and Al Gore presidential campaigns. "California is a place where people want to win in November. It's a very good sign for Clinton if [Mr. Sanders] loses badly, because it means Democrats are more concerned about Trump than the differences"
"She was the one who was perfectly placed. She was trying for so long and nobody wanted to listen to her. She started this," said Samuel Popkin, a political science professor at the University of California, San Diego, who served as a consultant to the Clinton and Gore presidential campaigns. "Warren was perfectly placed to really push the line."