PHILADELPHIA — It keeps getting worse for Debbie Wasserman Schultz.

The outgoing chairwoman of the Democratic National Committee, who announced her resignation on Sunday amid the revelation of committee emails suggesting an institutional preference for Hillary Clinton over Bernie Sanders, showed up on Monday morning to address a breakfast meeting of Florida delegates.

With her speaking slots and officiating duties all but scrapped during the convention — it was announced later that she would not “gavel in” Monday’s opening — it was to be one of the embattled Florida congresswoman’s few public appearances.

And it was a disaster.

Protesters, wearing Sanders T-shirts and buttons, stood and held signs that read “E-MAILS” and “We Don’t Want Cheaters In Our Party Anyway” and “NO!” and “Division” and “Thanks for the ‘Help’ Debbie.” They booed, loudly, and screamed “fair elections” as Ms. Wasserman Schultz took the lectern and said: “It is so wonderful to be able to be here with my home state. All right everybody now, settle down. Everybody settle down, please.”

Her supporters, in Debbie Wasserman Schultz T-shirts, tried to drown out the protesters by chanting “Debbie, Debbie, Debbie.” They couldn’t.