In hour one of Here & Now’s March 30, 2018 full broadcast, we review the week in politics — including tit-for-tat expulsions of diplomats, Veteran Affairs Secretary David Shulkin’s firing and Stormy Daniels fallout — with NPR’s Ron Elving and CNN’s Juana Summers. Also, we meet SoFi, a robot fish created by roboticists at MIT that can swim underwater and help researchers study ocean life up close. And New Jersey is one of a number of states trying to pass new gun laws, following the school shooting in Parkland, Florida. We talk with president of the New Jersey Second Amendment Society, who’s against measures passed by the state assembly this week, including a limit on the magazine capacity of guns.