During a Congress press conference at Delhi Press Club, Gandhi made a brief appearence and said, "The ordinance is a complete nonsense. It should be torn and thrown away."
"We must stop making compromises," he said.
A delegation of main opposition Bharatiya Janata Party (BJP) met President Pranab Mukherjee on Thursday and requested him not to sign the ordinance.
Senior BJP patriarch L K Advani after the meeting said the party is opposed to this ordinance as it is unconstitutional, illegal and immoral.
Senior BJP leader Sushma Swaraj said the President has assured them that he will examine the ordinance before take any decision.
Meanwhile, Mukherjee has asked Union Law Minister Kapil Sibal, Union Home Minister Sushilkumar Shinde and Parliamentary Affairs Minister Kamal Nath to meet and apprise him on the ordinance.
Earlier, senior leaders of BJP and ruling Congress - Sushma Swaraj and Manish Tewari - started a war of words on micro-blogging site Twitter over the Union Cabinet clearing the ordinance.
"Union Cabinet has approved Ordinance on convicted MPs. We are opposed to this. We request the President not to sign this Ordinance," tweeted Swaraj.
"President is not obliged to sign an Ordinance that is unconstitutional," she said.
Reacting to her tweets, Tewari on Wednesday said: "TO LOP-SS The constitutionality or otherwise of legal enactments are tested in Constitutional courts and not in the BJP's moat. Unsolicited."
He further posted: "Advise is neither appreciated nor taken seriously. These are the first principles of the legal profession Advise of LOP amusing/surprising."
The Union Cabinet on Tuesday cleared an ordinance to undo the Supreme Court's order that disqualify convicted MPs and MLAs.
The ordinance aimed to allow convicted legislators to retain positions if the appeal against the conviction is admitted by a higher court within 90 days.
Earlier, the apex court had refused to consider the government's plea seeking review.
However, it had agreed to review its decision on whether a person in jail has the right to contest elections.
On July 10, the Supreme Court ruled that MPs and MLAs, facing criminal charges, if convicted, would stand disqualified from the date of conviction.
They will stand disqualified even if they appealed to a higher court.
The court had cancelled a provision in the electoral law, which ensures that convicted lawmakers cannot be disqualified if they appeal in a higher court within three months.
--IBNS (Posted on 28-09-2013)