New Delhi, Sept 06: The Congress-affiliated National Students Union of India (NSUI) on Saturday swept the elections to the Delhi University Students Union (DUSU), winning all four top posts. NSUI candidates defeated the Bharatiya Janata Party (BJP)-backed Akhil Bharatiya vidyarthi Parishad (ABVP) nominees in the polls conducted on Friday for the posts of DUSU president, vice-president, secretary and joint secretary. The winners are: Rohit Chowdhury, Narendra Tokas, Ragini Nayak and Pankaj Kochar. Bureau Report