Jeans and t-shirts were his preferred attire when he worked with Narendra Modi on his election campaigns, first to win the Gujarat Assembly election in 2012 and later the general election in 2014. But these days visitors in Patna are more likely to find Prashant Kishor dressed in a spotless white kurta and pyjama. The choice reflects the eye for detail of the man at the helm of the campaign that is threatening to stop Modi's streak of electoral victories and upset poll pundits in Bihar.