India’s impending purchase of the Russian S-400 missile system has come to be the leitmotif of the “2+2” dialogue of the foreign and defence ministers of India and the United States due to take place in New Delhi on September 6. However, the issue here is not about a single defence transaction, either. There are far wider geopolitical ramifications. The heart of the matter is that the Countering America’s Adversaries Through Sanctions Act (CAATSA), which was signed into law by President Donald...
