The Congress had written to the Election Commission last week saying that the random surveys "lack credibility" and could be "manipulated and manoeuvred" by people with "vested interests".
"Those who have followed Indian politics and the workings of the Congress party after Independence would agree that the stand of the Congress party does not come as a surprise. The biggest casualty of the Congress party's arrogance while in power and its tendency to trample over institutions has been our fundamental right to free speech," Modi said in a hard hitting attack.
