He is the Prime Minister of India, he is meant to be a leader. He should do whatever it takes to ensure the GST is pushed through and given the fact he enjoys a histroic majority I will consider every session he doesn't get the GST passed as a personal failure for him.
Not a chance brother, I can assure you of that. The F-18 makes more sense but even that falls short of the offer on the table with Dassualt for the Rafale.
+ from what I know no Russian engine is being considered for the AMCA, the ADA/IAF want a higher life engine than the Russians can deliver.
You should check out the Rafale sticky thread (especially the last 15 pages), interesting times indeed