The passage at arms came during a debate on the Indo-US nuclear deal in the Rajya Sabha when Sinha also charged the government with coming under US pressure in not signing the agreement for four more reactors for the Koodankulam atomic power plant when the Russians were ready with a draft during the Prime Minister's recent visit.
Sinha had earlier attacked the government saying External Affairs Minister Pranab Mukherjee failed to meet Russian President Vladimir Putin and his Russian counterpart while Defence Minister A K Antony could not meet Putin during their recent visits. He wondered what had happened to the country's relations with Russia.
Stunned by the Prime Minister's remarks, Sinha said Singh was getting personal and he was sorry for this. He also retorted that Singh was the Chief Economic Adviser in the government in which he was the Finance Minister(in the short-lived Chandrashekhar government).