The emerging Trump doctrine: Don't follow doctrine

“We have learned that Trump is not so isolationist as many Europeans feared he would be — he appears to care about victims of a gas attack in Syria,” said Charles Grant, director of the Centre for European Reform in London. “We have learned that he understands that US influence had suffered from the perception — which grew under Obama — that it was a power weakened by its reluctance to use force.”...

...Mr Grant and others noted that the strike, coming as Mr Trump shared a meal with Mr Xi, could resonate in Asia as well, leaving North Korea to wonder whether the president might resort to force to stop its development of ballistic missiles.