New Delhi, Feb. 16 -- US-India relations were once described as one of Washington's most important strategic bets in the 21st century. But, over the past year, that partnership has come under serious strain - buffeted by trade disputes, sharp rhetoric, and deep disagreements over Pakistan and Kashmir. Former US national security official Lisa Curtis spoke about the turbulent state of US-India ties on a recent episode of Grand Tamasha, a weekly podcast on Indian politics and policy co-produced by HT and the Carnegie Endowment for International Peace. Curtis is the co-author (with Richard Fontaine) of a widely circulated essay in Foreign Affairs which argues that the current rupture is not just another rough patch, but rather a potentially co...