Maintaining that he "made a mistake twice" in the past by joining hands with RJD, Bihar Chief Minister Nitish Kumar on Saturday said that now he would stay permanently with the National Democratic Alliance (NDA). Addressing a public meeting in favour of NDA nominee, Vishal Prashant of BJP for the Tarari assembly byelection, Kumar said, "I have said it earlier alsoI am once again saying that we (BJP-JDU) were together earlier. I made a mistake twice in the past by joining hands with the RJD., I went 'idhar udhar' twice in the pastBut now, I have again come to the NDA. I will remain permanently with the NDA". He said, "We have been working for the development of Bihar since 2005. Several infrastructural and development works have been done in Bihar after 2005..and it will continue further under the NDA rule". Kumar accused RJD of trying to "polarise" votes on "communal lines" in the upcoming bypolls in the state. "They (RJD) always try to create a divide on communal lines. When RJD w