The U.S. airstrikes on Syria stoked new tensions with Iran and generated calls in Tehran for increased military support for President Bashar al-Assad’s regime. Iranian officials said on Friday the U.S. attack violated international law and accused President Donald Trump of siding with Islamic State and al Qaeda in Syria. “Not even two decades after 9/11, [the] U.S. military is fighting on same side as al-Qaeda & ISIS in Yemen & Syria,”

Iranian Foreign Minister Javad Zarif tweeted on Friday. “Time to stop hype and coverups.” But Mr. Trump and his advisers have already taken steps in recent months to try to roll back Iranian influence in the Middle East, despite the landmark nuclear agreement forged between Tehran and global powers in 2015. MORE