Mamdani wins NYC mayoral race, Sherrill and Spanberger elected governor, NBC News projects

Now to election night in the high stakes races marking the first electoral test of President Trump's second term. The big one we've been watching all night. New York City and the race for governor New Jersey.Also a big test for both President Trump and the Democrats. We're watching critical races in Virginia and California as well. Let's get right to Sam Brock with breaking news on the high stakes night.>> Tom, good evening. It's a celebratory mood here in Brooklyn and the watch party for Ziron Manny. If I ...