“I think about voter suppression more than the average politician,” he wrote on Twitter. “To call RCV voter suppression, or compare it to a poll tax, is **incredibly** wrong and dangerous. Stop it.”
Later in the day, when a reporter asked Mr. Adams if he could assure voters that he would not emulate the former President Donald J. Trump and claim the election was stolen, Mr. Adams’s response was equivocal.
“I assure voters that no one is going to steal the election from me,” he said.
Mr. Yang’s advisers were hopeful that Mr. Adams’s outbursts, while designed to rally his own supporters, might stoke doubts among some moderate voters who were considering ranking Mr. Adams.
A spokesman for Mr. Adams had no comment on that school of thought.
The rest of the last campaign day before the primary played out in the shadow of the Adams-Yang dispute. The tone outside of the firing zone was substantially more lighthearted, as the candidates dashed through the five boroughs in one last-gasp attempt to win voters’ allegiance.
They glad-handed at subway stations and rallied with supporters, and Mr. Yang zipped around the five boroughs in a van emblazoned with his face that his campaign dubbed the Yangatron — a nod to an interview comment where Mr. Yang said his favorite past New York City mayor would be a “Voltron”-like amalgamation.
On Monday morning, Ms. Wiley returned to the vote-rich Upper West Side of Manhattan to campaign outside of Fairway Market on Broadway, a popular stomping ground for candidates.
“All the best to you, queen,” one woman shouted as she walked past.
Reporting was contributed by Emma G. Fitzsimmons, Katie Glueck, Michael Gold, Jeffery C. Mays, Ashley Wong and Mihir Zaveri.