In the 1960s, the German government put a tariff on American chickens. President Lyndon B. Johnson then retaliated with a tariff on light-duty commercial vehicles and trucks. The back-and-forth has come to define the U.S. auto sector. On this morning's show, why a veteran automotive CEO calls this chicken tax "one of the most important, formative aspects of how the U.S. industry has evolved." But first, markets try to guess whether the U.S.-Iran ceasefire will hold.