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Well sir this Loksabha elections was fought on nationalism and surgical strikes , which boosted the BJP performance .. BJP would have still form the govt. Albeit with low majority... if opposition make much noise on f16 then the govt. Can easily came under pressure unlike Rafale, after all mig21 shoot down f16 in dogfight.. its a credible point unlike Rafale which BJP govt. Can't counter with anything..I don't think choice of fighter aircraft would really decide elections, even with all the tension between India and Pakistan it's still quite technical and abstract for most people. This was the mistake Rahul made, he bet he could sway the elections by denouncing the Rafale deal constantly and it only caused his party to fall into irrelevance as that was not what most people cared about.
Still, there's absolutely no reason to choose the F-16. One could say there's a political reason so as to deepen the strategic partnership with the USA, but the USA are currently very busy demonstrating to the world that they are not reliable allies or partners. It's kind of like buying ten gallons of snake oil so that in exchange Dr. Quack McConartist will help you claim some real estate on the Sun. Anyone with a brain in working order will see through the scheme.