Congress communications in-charge Randeep Surjewala said Arun Jaitley's blogs are a clear case of finding lost political relevance by "churning unadulterated lies".
He alleged that the "minister without a portfolio" is desperately trying to "outwit his juniors" who have surpassed himto "impress the Badshah by weaving blatant lies and falsehood".
Earlier, Arun Jaitley while taking a jibe at Rahul Gandhi for his "anti-Narendra Modi tirade" questioned the Congress president's wisdom, saying it has to be acquired through learning and cannot be inherited.
The Congress party has become "ideology-less" because its "only obsession is a person called Narendra Modi", Mr Jaitley said in a Facebook post.
Mr Surjewala dubbed Arun Jaitley as the "worst" Finance Minister in India's history who pushed a resilient Indian into an unprecedented financial gloom.
The economy under Arun Jaitley has become the biggest NPA (non-performing asset) for the country, he said.
"Has the BJP and Shri Jailtey become agenda-less, achievement-less and argument-less?" he asked.
Instead of worrying about job creation, providing adequate MSP to farmers and national security, the prime minister is busy throwing "fitness challenges" and putting odd videos on social media, while Arun Jaitley is busy writing some hollow blogs, he alleged.
"The Congress wants to remind the prime minister and Jaitley that they have ruined this country's economy through their Modinomics + Jaitleynomics, and this country now needs a break from them," Mr Surjewala said.
Arun Jaitley in his blog had earlier said, "For a president of a national party (Congress) not to understand this basic procedure of bank functioning should be a matter of concern to the entire party as also the country."
"In dynastic parties political positions are heritable. Unfortunately wisdom is not heritable. It has to be acquired through learning," he said in a post titled "Is Congress Becoming Ideology-less? Is Anti-Modism its only ideology?"