Federal agents are there for security, not immigration enforcement, officials say. But trust is fragile after the administration’s recent crackdowns.

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Several blocks around Madison Square Garden will be closed to most people Wednesday afternoon. The city approved a ticketed watch party, though it was unclear whether it would take place.

© Vincent Alban for The New York Times

In bodegas and parks, in bars and pizzerias, the unofficial watch party has taken over New York.

© Todd Heisler/The New York Times