When Prime Minister Narendra Modi took to the stage at the lavish pre-wedding ceremony of parliamentarian Tej Pratap Yadav in Uttar Pradesh's Saifai, the attendees erupted in cheers. Mr Yadav is the grand-nephew of Samajwadi Party supremo Mulayam Singh Yadav; he is marrying Rashtriya Janata Dal chief Lalu Prasad Yadav's youngest daughter, Raj Laxmi.