The ad reportedly focused on Clinton’s positions on issues that Sanders had campaigned on, such as healthcare and minimum wage. At the end of the script, he was asked to use the former first lady’s campaign slogan.
“It’s so phony!” Sanders said. “I don’t want to say that.”
“People felt that it was him delivering his message, not Hillary’s,” said a Clinton campaign aide who had seen focus group reactions, the Hill reported. "People didn’t feel that it was an authentic pitch for her and what she wanted to do. It even had some backlash in folks saying that he’s not really supporting her.”
Sanders endorsed Clinton at the Democratic National Convention in July, which led to approximately 1,800 of his delegates walking out of the event in protest and storming media row outside the Wells Fargo Center in Philadelphia.