President Trump jabs at the Russian leader with threats; Vladimir Putin responds with flattery. But there are notable signals in their jousting, including a revived discussion about nuclear arms control.

Vladimir Putin has shockingly claimed that the war in Ukraine would have never started if the "2020 victory wasn’t stolen" from Donald Trump. Speaking to Russian state media, Putin said he was prepared to meet with the US President to discuss ending the devastating conflict.

Putin has said repeatedly that he is prepared to negotiate an end to the war, which first began in 2014, but that Ukraine would have to accept the reality of Russian territorial gains, which are currently about 20% of its land. He also refuses to accept Ukraine joining Nato, the military alliance of Western countries.