Donald Trump's 'Iran did it' leaves questions on evidence and what's next

President Donald Trump says “Iran did it,” and allies and experts mostly agree. That hasn’t erased questions about the strength of the evidence his administration has presented on this week’s attacks on oil tankers in the Persian Gulf — or resolve what happens next.

In the U.S., Acting Defense Secretary Patrick Shanahan said the military obviously needs “to make contingency plans should the situation deteriorate.” But Senator Bernie Sanders, a leading Democratic presidential contender, said “this incident must not be used as a pretext” for a war that would “be an unmitigated disaster for the United States, Iran, the region and