Bloomberg reports: Islamic State’s self-declared caliphate in eastern Syria is surrounded by some of the world’s strongest military powers. Their forces are advancing on several fronts. The battlefield odds aren’t even close.

That’s why the commanders of those armies — in Washington, Moscow and Tehran, as well as Damascus and Ankara — are looking beyond the coming showdown with the jihadists. When they’re killed or driven out, who’ll take over? It’s an especially sharp dilemma for President Donald Trump. Because for the second time this century, the U.S. risks defeating one Middle Eastern enemy only to see another one, Iran, emerge as the big winner.

The U.S. invasion of Iraq in 2003 toppled Iran’s bitter rival Saddam Hussein and replaced him with a sympathetic Shiite-led government. In Syria today, Iranian ally Bashar al-Assad has survived six years of civil war during which U.S. leaders repeatedly insisted that he had to go. His army, fighting alongside militias loyal to Tehran, is driving into Islamic State-held territory, setting up a race with U.S.-backed forces to liberate it. Even the areas where the Americans arrive first may eventually revert to Assad’s control.

That might not have been a problem for Trump the candidate. Before the election, he vowed to smash Islamic State without getting sucked into a wider war, and said he’d work with Russia, Assad’s other key backer. It could be a problem for the President Trump who told America’s regional allies last week that he’ll help roll back Iranian power — a promise that, in Syria at least, won’t be easy to keep. [Continue reading…]