This is CNBC's Morning Squawk newsletter. Subscribe here to receive future editions in your inbox. Happy Wednesday . Three candidates backed by New York City Mayor Zohran Mamdani won their primary elections last night, while a candidate who sparked a spending war between two artificial intelligence super PACs came up short. Stock futures are higher before the bell. All three major averages closed lower yesterday. Here are five key things investors need to know to start the trading day: Chip