Congress general secretary Digvijaya Singh has said it would be much better if RSS "sheds the garb of being a cultural organisation" and enters full time into politics.
He said RSS had been recently active in ensuring that Gujarat chief minister Narendra Modi was named as BJP's prime ministerial nominee.
"If this is not politics, then I do not know what is," he said.
The Congress leader said it was well-known that speeches made by RSS chiefs on Vijaya Dashami over the years are full of reference to politics and even Pakistan.
"RSS is fond of claiming that it was a cultural organisation but it has never done anything even remotely related to culture," Singh said on Saturday.