They have petitioned the Chief Electoral Officer (CEO) of the state seeking disqualification of Rao, alleging there is a "serious violation" of a relevant section of the Representation of People's Act by him.
Rao was a director of a private company which was a supplier of vehicles to the government "in pursuance of a Government Order", the Left parties alleged in their joint memorandum submitted to the CEO.
"Therefore, in these factual and legal circumstances it is hereby requested to issue appropriate orders disqualifying K T Rama Rao under Section 9A of the Act," said the memorandum submitted yesterday.
The Left parties also submitted a purported affidavit filed by Rao, the son of Chief Minister K Chandrasekhar Rao, for the 2014 assembly elections to support their claim.
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