Simon Tisdall

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

The collapse of the rules-based order is not confined to the land: we’re imperilled as centuries of maritime cooperation sink beneath the waves, says foreign affairs commentator Simon Tisdall

The president has blundered into a ‘forever war’ with Iran he can’t win, but refuses to end. Such hubris has a long history, says Guardian foreign affairs commentator Simon Tisdall

Ever the strategist, the Chinese leader is taking the offensive, both abroad and at home. That’s bad news for global order, and minorities in his country, says Guardian foreign affairs commentator Simon Tisdall

As chief US diplomat, Rubio could do great good – but he hasn’t yet. His pandering and neglect are a disgrace we shouldn’t ignore, says Guardian foreign affairs commentator Simon Tisdall

It’s no surprise some analysts say we are already in the midst of the third world war, but ordinary people have more power than we think, says Guardian foreign affairs commentator Simon Tisdall

The Russian leader is ploughing on with his forever war – and each day is a crime against humanity. Western democracies cannot simply sit on their hands, says Guardian foreign affairs commentator Simon Tisdall

This is no scoffing matter. The accelerating proliferation of advanced nuclear weapons is bringing ‘end times’ closer by the day, says Guardian foreign affairs commentator Simon Tisdall

Europe’s leaders can no longer trust a word that comes out of Washington. No more slaps on the wrist – we need concrete steps to punish Trump, says Guardian foreign affairs commentator Simon Tisdall

Once the midterms are over, Trump will be free to pursue vendetta politics. But with will and diplomacy, he can be reined in, says Guardian foreign affairs commentator Simon Tisdall