That is because the Congress has fooled the people of India for sixty years. Is not Lalu Prasad Yadav corrupt ? Oh yes he is. Is not Shibu Soren a murderer ? On yes he is. Was the Congress not corrupt in the Bofors matter ? Oh yes they were.
Have they hanged the attackers of Parliment ? No , they wont.
Have the Congress done anything worthwhile for the middle class ? No they havent.
That is where Modi is different. He shows that he can make some difference to the man in the street. While the Congress is restricted to words and words alone.
