Congress president Sonia Gandhi and vice-president Rahul Gandhi launched an offensive to isolate BJP and the Sangh parivar by drawing a secularism versus communalism battle line. Rahul first took a dig at Prime Minister Narendra Modi by calling Swachh Bharat Abhiyan a mere “photo opportunity”, and then said the foundation of social harmony in the country has been weakened with the spreading of “poison” of communalism.