New Delhi, Sep 13 (ANI): Political leaders react as Congress leader Kamal Nath slammed former PM Manmohan Singh for not preventing the scam in 2G spectrum, even after he wrote a letter to former PM warning him about the 2G spectrum scam. BJP leader Sambit Patra criticizing Kamal Nath for being a mere spectator said that his silence has cost the country a lot and that he should have resigned at that time and come out in the open. JD (U) leader Ali Anwar, taking a dig at Kamal Nath said that he must be showing his anger as he was not given a ministerial position. However, Congress leader Rashid Alvi defending former PM chose to twist Kamal Nath's statement itself.