Markets rallied during the session but plunged after hours as President Trump began to outline his tariff plans on foreign countries. They include a 20% import tariff on the European Union and 34% on China. Tesla (TSLA) led the trading session as a leader despite posting vehicle deliveries that slipped 13% year-over-year. Amazon (AMZN) caught a bid as it aims to take U.S. ownership of TikTok. Caroline Woods turns to the day's biggest market movers.