New Delhi [India], April 12 (ANI): Explaining the rationale behind the BJP welcoming back former partner Nitish Kumar and his party, the JDU, into the NDA fold, Defence Minister Rajnath Singh said his party was happy to have a leader with no ‘graft’ taint on him back in the mix. After a brief dalliance with the RJD, Congress and other parties in the Mahagathbandhan (grand alliance) in Bihar, Nitish, in another of his switchovers, returned to the NDA earlier this year and took oath as the chief minister for the ninth time with the support of the BJP and the other constituents in the ruling alli…