Why did Prashant Kishor join JDU if Nitish did nothing for Bihar: KC Tyagi

JDU leader KC Tyagi said that Prashant Kishor's allegations against Nitish Kumar are not worth responding to. Tyagi said if Prashant Kishor feels that there hasn't been much development in Bihar since 2005, then why did the IPAC chief join JDU in 2015? He further added that Kishor treats politics like business and worked for AAP in Delhi, TMC in West Bengal while being a national vice president of JDU.