I think BJP is the best bet as of today... And about karat..and its CPM... i think they came into lime-light bcoz they got the chance to support at centre... And after next general elections NDA will come into power and everyting will forget these karat, CPM..and so on....so on.. So they have only 8-10 months to be in news and they want to use this period as best as they can...
