As the bombing starts again, it’s clear the president has dragged the US into a limitless fiasco – and the world into an economic quagmire, says Guardian foreign affairs commentator Simon Tisdall

Donald Trump's actions this week have only confirmed he has run out of options and is now engaged in a simple war of wills, and calculations on who will run out of munitions…

Gamble on resuming hostilities raises prospect that conflict will overshadow US president’s second term