I. "The BJP, which has only one techtical reason to oppose the govrernment's Indo-US nuclear deal - that they don't get to hold the baby they cionceived - has just lost any shred of moral uprightness about opposing the dal, thanks to a motormouth in its fold". What is motormouth in the preceeding Para? II. What does "Dr. Jeckyll" mean in : " There is no Dr. Jeckyll in Hyde Act".
A motormouth is someone who talks a lot. In this case, it's someone who has said things the BJP don't want to be said in public. Jeckyll & Hyde refers to people who have two very different personalities, usually one that is seen in public and a darker one that is private.