"Kejriwal is a part of the overall plan of RSS for a Congress Mukt Bharat. I know I would be abused by both RSS and Kejriwal fans," Singh tweeted.
Kejriwal took oath as the eighth Chief Minister of Delhi yesterday after winning with a thumping majority in the Delhi Assembly polls.
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Attacking the RSS, the Congress leader said that he was called names when he had earlier said that the Sangh was behind Anna Hazare movement's as well.
"When I said RSS was behind Anna Movement, no one believed me I was called mad. But ultimately I was proved right and I would be this time too," he tweeted.
The AAP had won 67 of the 70 seats in Delhi decimating Congress and leaving only three seats for the BJP.