Addressing a rally to mark culmination of the year-long celebrations of the 125th birth anniversary of B R Ambedkar at Kasturchand Park here, Sonia asserted the legacy of the dalit icon for Congress and tore into RSS over reservation.
"The right-wing outfit is bent upon to destroy the democratic values, disturb secular fabric and alter Indian Constitution authored by Dr Babasaheb Ambedkar.
"RSS wants to crush reservation for the scheduled caste, scheduled tribes, OBCs and minorities which is guaranteed to them by Constitution," she said.
Seeking to blunt BJP's efforts to 'appropriate' legacy of Ambedkar, Sonia said, "Congress had given Dr Ambedkar his dues by appointing him as chairman of the Draft Committee of Constitution.
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"Congress will leave no stone unturned to save the democratic values and secular fabric being destroyed by some forces. It is the constitutional duty of Congress to give protection to these factors".
Focusing her speech mainly on issue of reservation, the combative Congress chief said the Narendra Modi government is set to discriminate against women at Panchayati level by depriving them from enjoying power in their villages.
Sonia said this will deprive about 80 per cent of dalit women from contesting Panchayati elections.
"The Congress regime brought the mid-day meal scheme for the children, which was a social revolution as dreamt by Ambedkar. Ambedkar received good support from the then Congress stalwarts like Jawahralal Nehru and Sardar Valabhbhai Patel," she said.
Targeting Modi, she said BJP government is "destabilising the democratically-elected Congress governments in Uttarkhand and Arunchal Pradesh".
"The students' unrest has grown manifold under the current Modi government in the country. Congress has a moral responsibility and constitutional duty to protect the backward community, dalits, minorities and the under-privileged ones and party will not fail in it..Congress has been doing this for more than 60 years," she added.