The world’s most admired democracy is being held hostage by a clique of far-right thugs. It would be a mistake to placate them

It’s not only about Donald Trump. It’s not just about saving Ukraine, or defeating Russia, or how to boost Europe’s security, or what to do about an America gone rogue. It’s about a world turned upside down – a dark, fretful, more dangerous place where treaties and laws are no longer respected, alliances are broken, trust is fungible, principles are negotiable and morality is a dirty word. It’s an ugly, disordered world of raw power, brute force, selfish arrogance, dodgy deals and brazen lies. It’s been coming for a while; the US president is its noisy harbinger.

Take the issues one at a time. Trump is a toxic symptom of the wider malaise. For sure, he is an extraordinarily malign, unfeeling and irresponsible man. He cares nothing for the people he leads, seeing them merely as an audience for his vulgar showmanship. His undeserved humiliation of Ukraine’s valiant leader, Volodymyr Zelenskyy, was, he crowed, “great television”. As president, Trump wields enormous power and influence. But Potus is not omnipotent. America’s vanquished Democrats are slowly finding their voice. Connecticut senator Chris Murphy shows how it should be done. Don’t bite your lip. Don’t play by rules Trump ignores. When Trump tried to blame diversity hiring policies for January’s deadly Potomac midair collision, Murphy hit back fiercely.

Simon Tisdall is the Observer’s foreign affairs commentator