Lucknow, March 15 -- Mayawati, the national president of the Bahujan Samaj Party (BSP), on Sunday launched a sharp political attack on the Indian National Congress, Samajwadi Party and Bharatiya Janata Party while calling on Dalits and other marginalised communities to unite under the BSP banner and secure the "master key of power" through electoral strength.

Speaking on the birth anniversary of BSP founder Kanshi Ram, Mayawati paid tribute to the leader and reiterated the party's commitment to the ideology of BR Ambedkar. She said Kanshi Ram devoted his entire life to mobilising the Bahujan community and carrying forward Ambedkar's mission of social justice and empowerment.

After offering floral tributes at the BSP central camp office in...