He continued with the same ministry after the 2004 elections which was won by the Congress led alliance, which included the DMK. His tenure as an Environment ministry came under intense scrutiny in 2011 during the 2G Spectrum case.
He continued serving in the same ministry after the 2004 elections, which were won by a coalition including the DMK. His tenure as Environment minister was subject to intense scrutiny during the 2011 2G Spectrum case.