Huge margins in exit poll results indicate BJP's dominance is waning in Madhya Pradesh, Rajasthan, Chhattisgarh

Opinion polls are uncertain about who is going to win the Assembly elections in Madhya Pradesh and Chhattisgarh. Out of nine opinion polls published on Friday, eight said Congress would win Rajasthan and similarly the TRS is expected to win in Telangana. I was surprised to see that there was uncertainty over Madhya Pradesh and Chhattisgarh. In fact, the average of the polls suggests that the Bharatiya Janata Party will lose its majority in both Chhattisgarh and Madhya Pradesh. These two states have looked like they are following the Gujarat model. Both are two-party states where the Congress seemed to be permanently in the opposition. If the opinion polls are right, this could be ending on Tuesday.However, we do not know for sure, and because there is a problem with opinion polling in India. In the United States, presidential elections can be predicted by an opinion poll with a sample size of less than 1,000. This is done over the telephone and often by a robocall, meaning a recorded message which asks the voter to select options from a menu. In the 2012 election, one psephologist, Nate Silver, predicted accurately the result in all 50 states in the US.[caption id="attachment_5668351" align="alignleft" width="380"]

File image of Narendra Modi addressing rally in Rajasthan. Twitter/@BJP4India[/caption]America has only two parties, the Republicans and the Democrats. They have other divisions like blue collar and white collar workers, and rural and urban residents. Lastly, they have race, the biggest minorities being African Americans and Latinos (meaning the Spanish speakers). Opinion polls factor in these differences and are able to accurately predict who will win. On election day in America, news networks have exit polls that predict the results even before counting begins and these predictions are almost always right.In India, we have the most complex political society of any democratic nation. We are divided by language, by economics, by cultural differences, particularly comparing the north to the south and the North East. We also have the division — which has become increasingly pronounced — of religion. And we have the unusual and unique division of caste. This makes it difficult to predict elections, especially those which are close. Very large sample sizes are needed in India and this costs a lot of money because the exit polling agencies must send out field agents to interview people.Some agencies get around this by unique solutions. There is a successful agency called Today’s Chanakya that says it has a different way of assessing each constituency. It sometimes does not reveal to respondents that it is conducting an opinion poll.One of the biggest problems pollsters have is that people often lie in India. Not because we are devious people but because we have no confidence in how this information will be used and whether revealing it will harm us in some way.The agency CSDS does a post-poll survey in which it sends its staff to people’s homes and conducts in-depth 30-minute interviews. It seeks to know why people have voted in the way that they have and what are the issues concerning them. They have a relatively small sample size because of the focus on depth and quality rather than quantity.Often the polling agencies seem to be merely guessing. I can remember one general election about 15 years ago in which the agency was headed by my friend, pollster GVL Narasimha Rao (he is a BJP leader now). The show was being hosted by another friend, columnist Swaminathan S Anklesaria Aiyar. As the results started coming in, it turned out that Rao’s agency had got almost every state wrong. Aiyar asked him about it, and Rao said that his national total was more or less right. This is, of course, not acceptable and it’s just guesswork pretending to be science.One way of getting around the unpredictability of polling in India is to give a band or a range. If we look at the Madhya Pradesh polls, four agencies have predicted not a specific number but a range, sometimes as wide as 20 seats. This means that they are not confident of their polling figures and not even sure about who will win. The data is either confusing or the numbers are too close, and the one thing this indicates is that the dominance of the BJP in these states is waning though the prime minister campaigned hard.The results are very important nationally because, in the Lok Sabha Election of 2014, the BJP had won 62 out of the 65 Lok Sabha seats in Rajasthan, Madhya Pradesh and Chhattisgarh combined. The confidence of the opposition will go up and alliances will be easier to form if it becomes apparent that the BJP is losing ground in north India. In that sense of all the Assembly elections that we have seen since 2014, these are the most important.Follow all the latest updates from the Telangana Elections hereFollow all the latest updates from the Mizoram Elections hereFollow all the latest updates from the Chhattisgarh Elections hereFollow all the latest updates from the Madhya Pradesh Elections hereFollow all the latest updates from the Rajasthan Elections hereFollow Firstpost's coverage of the 2018 Vidhan Sabha Elections here