Trump's scenarios for Syria

Victims of a chemical weapons attack
Syrian kids are treated after Saturday night's alleged chemical attack. Photo: White Helmets / Anadolu Agency via Getty Images

Today is the first day on the job for John Bolton, President Trump's third national security adviser, and the hawkish former U.S. ambassador to the U.N. will be instantly thrown into one of the administration's most consequential decisions.

What's at stake: CFR President Richard Haass tells me that after the chemical attack in Syria and Trump's quick, tough rhetoric on Twitter: "Doing nothing now would be a moral and strategic fiasco."