ANALYSIS: President Trump redefines own doctrine with Syria strike

The president showed he is willing to move quickly on military action.

It demonstrates that the president does not intend to be constrained by his own previous statements or positions when deciding how to act. And it signals to a world that’s skeptical of an untested president that the Trump doctrine will include American action that has little precedent in terms of its speed – a clear break with the international deliberations favored by the last administration.

This would appear to be the kind of military engagement Trump suggested that he would avoid as president. His Twitter feed is littered with warnings against President Obama using air strikes or other means to attack Syria, suggesting that he needed congressional authorization and that American interests would not be advanced by intervening.

Yet Trump did choose to get involved this week, driven by shocking images of a chemical attack’s aftermath, and a sense that Assad was testing Trump’s resolve.

The decision raises profound questions about Trump’s strategy regarding Syria and Russia, including whether to support regime change, as well as what criteria he plans to use when deciding whether and how to use military force. Assad retrains his grip on Syria, and he won’t be the last head of state to test Trump.

That leaves Trump in unfamiliar, if precarious, territory. After a loud Thursday night, he enjoyed a relatively quiet Friday, owing to a touch of bipartisan consensus about the step he took.

He may well reap political rewards for his actions. Yet extrapolating the latest events into future actions is much like reading the president’s words for guidance – a fraught exercise, perhaps more than ever.