Donald Trump has sold out Ukraine. He makes appeaser Chamberlain look like a man of iron principle | Simon Tisdall

What happened: Guardian commentator Simon Tisdall argues that Donald Trump has betrayed Ukraine, describing US-Russian talks on a settlement as at an advanced stage after meetings in St Petersburg this week. Why it matters: Tisdall writes that Europe's leaders can no longer trust Washington and calls for concrete steps to punish Trump, saying his actions make Chamberlain look like a man of iron principle.

Guardian commentator Simon Tisdall argues that Donald Trump has betrayed Ukraine, describing US-Russian talks on a settlement as at an advanced stage after meetings in St Petersburg this week.

Tisdall writes that Europe's leaders can no longer trust Washington and calls for concrete steps to punish Trump, saying his actions make Chamberlain look like a man of iron principle.