"Kumar is an arrogant person who believes in the mantra of 'I' ... There is no place in JD(U) for anyone who does not nod to the chief minister's views," Tiwari said in a rejoinder to state unit JD(U) chief Bashistha Narayan Singh.
The disgruntled JD(U) MP said it was Kumar's 'big ego' that came in the way of his nomination for a second term and two other innocent leaders (N K Singh and Sabir Ali) met the same fate for which he felt sorry.
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Tiwari criticised Singh for claiming that the decision to send three new persons to Rajya Sabha in place of the sitting MPs was taken at his behest to which Kumar concurred and said he was trying to defend a leader (Nitish Kumar) whose dictatorial style of functioning was known to everybody.
He said he had apprised Singh about his inability to contest the Lok Sabha polls. N K Singh too was not expected to contest the polls against the sitting independent MP from Banka - Putul Singh, the widow of former union minister Digvijay Singh.
But still the party went ahead with its decision to field Singh and him for the general election, Tiwari said and claimed that Sabir Ali was brought from LJP on the promise of giving him a second term in Rajya Sabha - a promise on which Kumar had reneged upon. "It speaks volumes about his arrogance."
Kumar, he said, had shown his trademark dictatorial ways earlier too when he denied ticket to Digvijay Singh from Banka in the 2009 general elections.
"Will you explain why Digvijay Singh was denied the ticket despite being a tall leader in JD(U)?" Tiwari asked the state party chief.
Singh had contested as an independent candidate and won. After his untimely death his wife Putul Singh contested and retained the seat.
Earlier, Tiwari had dashed off a terse letter to Singh in which he lashed out at Kumar for denying second term to him and the other two MPs and replacing them with three new faces - Ramanath Thakur, son of the former chief minister Karpoori Thakur; Kahkashan Parveen and Haribansh, a senior journalist.
Kumar has refused to react to Tiwari's diatribes so far.