T Subbarami Reddy, currently a member of Rajya Sabha, triggered the war by announcing that he would contest the Lok Sabha election from Visakhapatnam constituency that he had represented in the 90s.
He suggested that Union Minister of State for Commerce Daggubati Purandeswari, now representing Visakhapatnam, shift her base to Narsaraopet Lok Sabha segment.
"We never approached Subbarami Reddy for anything," Venkateswara Rao rebutted.
He went on to dig into Subbarami Reddy's past and recalled his alleged involvement in the cement scandal during the construction of Nagarjuna Sagar dam in the 1970s.
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An infuriated Subbarami Reddy then hit back calling Venkateswara Rao "mad".
The MP, in turn, threatened to sue the MLA for "defamation" of Rs 5 crore.
In the last two days since the verbal duel began, Purandeswari remained silent though she had once earlier said that it was for the Congress high command to decide who should contest from where.
Senior Congress leader and MP V Hanumantha Rao said that it was not right on part of the two leaders to wash dirty linen in public.
"It may not do any personal damage to either Subbarami Reddy or Venkateswara Rao but the Congress' image will get tarnished," Hanumantha Rao lamented.