Zohran Mamdani spent the last hours of his wedding celebration in Uganda huddled remotely with his team after learning of New York’s deadliest mass shooting of the last 25 years.

The killing of four people including a police officer in a Midtown Manhattan office building rattled a city where mass attacks are rare and violent crime has declined.

Back from Uganda, Zohran Mamdani, the Democratic candidate for mayor of New York City, sought to reassure voters concerned that his left-leaning policies would endanger the city’s safety.