It’s been 3 1/2 years since Russia launched an unprovoked invasion of its Ukrainian neighbour. Ukraine’s capacity to resist has depended on two things: its own will to fight and support from its allies. Until January this year the US was one of those allies. Then things changed.

But in the last week President Trump seems to have taken a turn against Russia. The US president said he was “very unhappy” with President Putin over the lack of progress towards a ceasefire agreement to end the war in Ukraine. On Monday the White House announced 100 per cent tariffs on countries which do business with Russia - those tariffs to begin in 50 days time unless a ceasefire with Ukraine is agreed. President Trump also announced that the US would be sending weapons to Ukraine which NATO allies - and not America - would pay for. David Aaronovitch and guests discuss whether the tide is turning in the Trump-Putin relationship and if this could change the course of the war between Russia and Ukraine.

Guests: Paul Adams, BBC World Affairs Correspondent Anton Grushetskyi, Executive director Kyiv International Institute of Sociology Shashank Joshi, Defence Editor, The Economist Angela Stent, Senior fellow at the Brookings Institution and a former US National Intelligence Officer for Russia

Presenter: David Aaronovitch Producers: Caroline Bayley, Ben Carter and Kirsteen Knight Production Co-ordinator: Maria Ogundele Studio engineers: Tom Bartlett and Alyson Purcell-Davis Editor: Richard Vadon