Top U.S. officials head to India next week to discuss the strategic relationship and finalize agreements allowing major arms sales to move forward, but New Delhi is not immune from sanctions if it moves forward with the purchase of new Russian weapons, according to a Pentagon official. Defense Secretary Jim Mattis and Secretary of State Mike Pompeo will meet with their Indian counterparts on Sept. 6 for an inaugural "two-plus-two" dialogue in New Delhi. Their conversations will cross a swath...