New York City can continue rolling out its pied-à-terre tax while a legal challenge plays out, after an appeals court temporarily put on hold a Staten Island judge's order that had blocked the plan. The tax, championed by Mayor Zohran Mamdani, imposes a surcharge on luxury homes. The city has warned that the delay jeopardizes an estimated $500 million in projected revenue. President Donald Trump has criticized the tax, saying it must be stopped, and has vowed to explore federal options to prevent it. The appeals court's decision allows the rollout to move forward for now, but the legal battle is ongoing.