Union Home Minister Amit Shah on Thursday exuded confidence that the BJP will win the upcoming assembly polls in West Bengal, and "drive out every single infiltrator" from the state, which was among the ones "worst affected by demographic change". Shah made the remark in Araria district of Bihar, where he launched projects worth Rs 175 crore of the Sashastra Seema Bal (SSB) and dedicated to the nation a couple of new border outposts. "It is the top priority of the BJP government to drive out every single infiltrator from the country, who are not just a threat to national security, but also feed on welfare benefits meant for people, thereby diluting the impact schemes run by the government could make," he said. "Infiltration on a large scale also results in encroachments in bordering areas. We are committed to demolishing these. Infiltration also poses the threat of demographic change, which can wreak havoc with the culture, and even geography, of a region," Shah said. The Narendra