PHILADELPHIA — Now that Bernie Sanders has officially lost the Democratic presidential nomination, his ardent followers say they don’t know if they can vote for Hillary Clinton, or whether they’ll even return to the Democratic convention or the party they once believed would put their candidate at the top of the ticket.

“They can have their convention, that’s not our party,” Nebraska delegate Edgar DeLeon told the Washington Examiner as he and a group of Sanders supporters stormed out of the arena.