Former Sec. of State Antony Blinken: Instead of 'America First' we're heading to 'America Alone'

Former Secretary of State Antony Blinken joins 'Squawk Box' to discuss President Trump's tariff policy, maintaining U.S. allies amid a trade war, state of U.S.-China relations, what the Trump administration's endgame is with tariffs, negotiating with Iran over its nuclear deal, and more.