Patna: Bihar Chief Minister Nitish Kumar and Rashtriya Janata Dal (RJD) Lalu Yadav will be addressing a press conference tomorrow to launch a signature campaign 'shabd wapasi' against Prime Minister Narendra Modi's 'DNA' remark.

'Inspite of our repeated pleas, Modiji hasn't retracted his derogatory remarks on our DNA. We're going to launch a 'shabd wapasi' campaign against him,' tweeted Nitish.