In a special video analysis for Times Radio, I discuss Vladimir Putin’s latest gamble in his 27 1/2-month invasion of Ukraine — and why it may be failing.

Russia’s month-long cross-border offensive into the Kharkiv region in northeast Ukraine appears to have stalled.

Meanwhile, Putin’s decision to attack has led the US to ease its restriction on Ukraine’s use of American-supplied weapons inside Russia. Kyiv, which is reguarly hitting Russian military facilities, naval and air forces, and oil refineries, may also be using long-range British and French missiles.

And billions of dollars of US and European military aid is beginning to reach the frontline.