JD(U)'s Kaladhar Mandal recorded the biggest margin of victory in Bihar Assembly elections 2025, winning Rupauli constituency by a margin of 73,572 votes against RJD's Bima Bharti. The lowest margin was recorded by JD(U)'s Radha Charan Sah, who won Sandesh seat by 27 votes against RJD's Dipu Singh. The second-lowest margin (30) was recorded by BSP's Satish Kumar Yadav.