But the backlash, particularly among the Vermont senator’s allies on the left, was swift and overwhelming, triggered in part by Uygur’s history of sexist and otherwise offensive comments. By Friday, Uygur claimed he was no longer taking endorsements, and Sanders withdrew his blessing…

“In the big picture, it doesn’t mean a whole hell of a lot,” said Mike Mikus, a Pittsburgh-based Democratic strategist who has not endorsed any presidential candidate. “But it’s just one more thing added to the pile where people feel that [the Sanders campaign] doesn’t have their stuff together.”

Part of the problem for the Sanders campaign was the timing of the announcement. HuffPost reported on Wednesday that some progressive activists were galled that Sanders has yet to endorse Jessica Cisneros, a progressive immigration attorney challenging conservative Democratic Rep. Henry Cuellar of Texas, even though Sen. Elizabeth Warren (D-Mass.), Rep. Alexandria Ocasio-Cortez (D-N.Y.) and a host of mainstream liberal groups have already gotten behind her.