"Had Rajiv Gandhi married a Nigerian woman and if she was not a white-skinned woman, would the Congress have then accepted her leadership?," he told journalists yesterday.
Various women leaders also attacked Singh, who is Minister of State for Micro, Small and Medium Enterprises, saying it reflected his racial mindset and attitude towards women.
"Imagine a situation, if Congress was in power instead of us and had Rahul been the Prime Minister, and if for some reason, the PM had disappeared for more than 47 days.
"Absence of Congress Vice President is similar to that of the missing Malaysian airliner that still has not been located. The same way the Congress leader was not present in the budget session. No one in Congress is ready to speak. This is unfortunate for the Congress and a joke for the country," he told journalists in Hajipur, Bihar, last night.
More From This Section
"If Soniaji and Rahulji have been hurt by my remarks, I express my regret," he said even as he maintained that his remarks were "off the record" and suggested that media was blowing it out of proportion.
Singh is not the first minister or a BJP leader to make controversial remarks that have caused embarrassment to the Modi government.
Parliament was rocked during the winter session by communal comments of minister Sadhvi Niranjan Jyothi during the Delhi elections that was disapproved by the prime minister. The party also had to distance itself from similar offensive comments of BJP MPs Yogi Adityanath and Sakshi Maharaj.