The biggest mistake Congress did in this election is that they called a truely honest person like Modi corrupt without any proof, and they could not prove any charge of corruption on Modi.....common man relates to Modi much more than he does with Rahul Gandhi,Priyanka Vadra and other congressis....and Modi is an expert craftsman in turning his criticism to his advantage and he converted Chowkidaar Chor hai campaign to Mai Bhi Chowkidar,hum sab chowkidar campaign......no one believes that Modi as a person is corrupt...and with no proof given ,it backfired on opposition.....we may have differences with the way Modi conducts himself but no one can doubt his love for the nation and no corruption image.
Another mistake was instead of talking on issues, they talked about Modi's mother, father,wife,mandir hopping, Janeoodhari etc stunts which people did not like. Rahul handled Congress attack in a very immature way and his spokespersons like Manishankar Iyer,Sam Pitroda ,Digvijay Singh ,Navjyot Singh Siddhu helped him in his goof up.....and he had Modi and Amit Shah who are master stragists as opponents and he was no match for them.