In the weeks before Super Tuesday, Mr. Sanders had indeed refused to yield to critics who were searching for gestures of accommodation. In Nevada, leaders of the powerful Culinary Workers Union Local 226, were frustrated that Mr. Sanders did not speak out more forcefully when his supporters heaped abuse on predominantly female union leaders over their opposition to “Medicare for all.”
As Culinary officials were deluged with vitriol, including graphic and misogynistic messages, Mr. Sanders placed a phone call to the union’s secretary-treasurer, Geoconda Argüello-Kline, but they never connected.
“Our feeling was that Senator Sanders should have said something earlier and should have been stronger about it,” said Bethany Khan, a political strategist for the union.