PATNA, Jan. 23 -- A day after a 'perplexed' JD-U leader Pawan Kumar Varma shot off an open letter to party chief and Bihar chief minister Nitish Kumar seeking 'ideological clarity' in the wake of its alliance with BJP in Delhi, JD-U vice-president and poll strategist Prashant Kishor trained his guns at home minister Amit Shah for his Tuesday's statement at a Lucknow rally that "nothing could stop CAA"....