 He was known for his impartiality as a Speaker and had on several occasions chided the Government and its ministers in the Assembly during its sessions for their shortcomings in respect of legislative conduct in the Assembly.He was also an expert in constitutional matters and his comments were always sought by the media with regard to interpretation of provisions of Indian Constitution.Radhakrishnan shifted his area of activity to the National Stage when he won the Lok Sabha (Lower House of Indian Parliament) from Chirayinkil Constituency in 1998.