Trump said he could stop war in 24 hours, but team appears daunted by negotiation with ‘a lot of detail attached to it’

One key to a successful negotiation is always being willing to walk away from the table. But it isn’t clear whether the Trump administration has threatened to give up on a Russia-Ukraine peace deal as a negotiating tactic or simply because it lacks the concentration for a complicated negotiation – a shortcoming that has dogged the administration’s foreign policy through its first three months in office.

Standing on a tarmac in Paris, the US secretary of state, Marco Rubio, issued a threat that the US could simply “move on” from mediating the biggest military conflict in Europe since the second world war. That would be the latest about-face for an administration that has already taken a back seat on negotiating a peace in Gaza and retreated on implementing worldwide tariffs that shook financial markets around the globe earlier this month.