Election Tracker: TDP to dent BJP's voteshare in TN, AP?

CNN-IBN in partnership with Lokniti has done an extensive poll survey across key battleground states. Today we will bring you the details on who's winning and who's losing in Tamil Nadu and Andhra Pradesh. Let us first take you through the methodology of this survey.

The findings are based on a survey conducted across the states of Andhra Pradesh, Bihar, Delhi, Maharashtra, Tamil Nadu and Uttar Pradesh by Lokniti, centre for the study of developing societies

Between February 17 and 23, 9,104 voters were surveyed across 512 locations of 138 parliamentary constituencies. These were the same constituencies sampled in the first two rounds of the survey. The sample profile is representative of caste, gender, religion and weighted by census 2011 figures where necessary.