Summary: Headlines for March 27, 2017; After Republican Infighting Dooms GOP Healthcare Plan, Trump Vows to Let Obamacare "Explode"; Medicare for All? Sen. Bernie Sanders Poised to Push for Single Payer After GOP Plan Falls Apart; More Than 1,000 Civilians Reportedly Killed by U.S.-Led Airstrikes as Trump Expands War on Terror; Bill McKibben: Trump May Have Approved Keystone XL, But People Will Stop This Pipeline Again
