The party also launched a sharp attack on Yadav, claiming that he, as the then JD(U) chief, "incited" Jitan Ram Manjhi against Nitish Kumar, who had backed the 'Mahadalit' leader's appointment as Bihar chief minister following the party's rout in the 2014 Lok Sabha polls.
Manjhi had rebelled against Kumar after the JD(U) decided to bring the latter back to the top post.
"If Yadav differed with Kumar on the decision to join hands with the BJP, he should have resigned from the Rajya Sabha as all MLAs, who elected him to the Upper House, backed the Bihar chief minister. No MLA, MLC or even a district president stood with Yadav," he said.
Targeting Anwar, Jha said he will be cited as an "example of thanklessness" in political history as Kumar picked him "from nowhere and sent him to the Rajya Sabha".
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"Anwar's term was about to end in a few months and still he did not resign. If both these leaders had even an iota of morality left, they should have resigned," he said in a statement.
Jha referred to BJP leader Mukul Roy who resigned from the Rajya Sabha after quitting the Trinamool Congress and later joined the saffron party.
"The decision of the Rajya Sabha chairman to disqualify them is historic," he said.
The Election Commission too had delivered an order saying that it was Bihar Chief Minister Nitish Kumar whose group represented the JD(U) and not the Yadav faction, he said.
"It is Kumar who helped Yadav become the JD(U) chief as its founder president George Fernandes did not want him to take over from him," he said, hitting back at Yadav for attacking the Bihar chief minister.
Yadav had yesterday said that the decision to disqualify him was part of a "conspiracy" as the BJP did not like his work to unite opposition parties against the NDA government.
Naidu had on December 4 disqualified Yadav and Anwar from Rajya Sabha on a plea that was filed in September.
Delhi Chief Minister Arvind Kejriwal condemned Yadav's disqualification, terming it as "illegal" and "political vendetta".
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