This is CNBC's Morning Squawk newsletter. Subscribe here to receive future editions in your inbox. Happy Tuesday. If you're a big Amazon user, your orders could soon arrive much faster. The e-commerce titan this morning announced plans to roll out 30-minute delivery in dozens of U.S. cities. Stock futures are slipping before the bell after a positive session yesterday. Here are five key things investors need to know to start the trading day: President Donald Trump didn't mince words about Iran'

Tag-uri: Donald Trump