Two key battleground states Bihar, where seven constituencies went to poll today, and Uttar Pradesh, where 15 seats were up for grab, recorded impressive voters' turnout of 58 per cent and 55.52 per cent. Congress hopes to retain as much ground as possible in Wednesday's phase covering central UP in the face of a strong surge by BJP, playing the caste and religion cards, and a desperate BSP and SP seeking to hold on to their Muslim-OBC-Dalit vote base.