YSRCP president Y S Jaganmohan Reddy said his party would fight tooth and nail to stall the bill and mobilise support of all opposition parties for united Andhra Pradesh.
"The Speaker announcing that the Bill is tabled without taking into consideration the opinion of the House is a sheer mockery of democracy which has happened ironically in Parliament where democracy has to be safeguarded.
"We condemn the manner in which the Bill has entered the House and it is a black day for parliamentary democracy," Jagan said.
In a hard-hitting attack, Jagan said it was "very shameful" on the part of Congress to indulge in divisive politics.
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Jagan also launched a vitriolic attack on Congress president Sonia Gandhi, saying she is behaving "worse than Hitler and is carrying out the division in an authoritarian and unilateral manner".
"By Monday when the Lok Sabha meets again, we will ensure to gather enough support to stall the Bill and the undemocratic division," he added.