MEL GURTOV – Tensions between the Russian defense ministry and the head of the Wagner mercenary group, Yevgeniy Prigozhin, had been running high for months, mainly because of differences over war strategy and Prigozhin’s accusations of insufficient battlefield support. Last week those tensions reached the boiling point. And now Putin is stuck, a position that the US and NATO can choose either to exploit or, hopefully, to press for peace.