The electoral math behind the contest for 2019

New Delhi: The Kairana bypoll results on Thursday show that a Congress-backed grand alliance of opposition parties has the potential to stop the Narendra Modi juggernaut in 2019 Lok Sabha. Whether or not that potential is realized will depend on how close-knit the grand alliance is, and the extent of the anti-incumbency swing against the Modi-led National Democratic Alliance (NDA) government.
A Mint analysis of the 2014 elections suggests that if all else remains the same, and the Congress and its potential partners are able to pool their votes, they will edge close to the Bharatiya Janata Party (BJP)-plus alliance but fall short of a few seats.
However, in a scenario with strong anti-incumbency, the Congress-plus alliance could gain a comfortable majority after the 2019 Lok Sabha elections.
To calculate the number of seats in this scenario, we assume that the BJP and its allies will lose 20% of the votes in the seats they hold (because of local anti-incumbency) and gain 10% of votes in the seats they don’t hold.
Further, we assume that the Congress-plus alliance will win at least as many votes as they did in 2014, and further gain at least half of the votes that the BJP-plus alliance loses. In this scenario, the Congress-plus alliance will end up with 312 seats. But if the Congress-led alliance fails to pool their votes, and loses, say, 30% of their combined votes —either because of internal divisions or because of a pro-incumbency wave in favour of Modi—it would be enough for the BJP-plus alliance to return to power in 2019 if it is able to gain even half of the votes the Congress-led alliance loses (i.e., 15% of the Congress-plus alliance votes). In such a scenario, the BJP-plus alliance would win 328 seats.
Thus, the ability of the Congress to pose a formidable challenge to the BJP will depend on its ability to stitch a cohesive alliance. If it is able to pull that off, it would be in a position to use its sizeable support base across the country to defeat the BJP. This would also allow the Congress to focus on winning in fewer seats, and help improve its votes-to-seats conversion ratio. While the BJP has typically enjoyed a better conversion record compared to the Congress, even by the Congress party’s low standards, 2014 marked a rather drastic low, when it won only 8% of the seats despite winning nearly a fifth of the national vote share.
The BJP’s ability to defeat the Congress and its allies will hinge on its ability to win other allies, and its ability to broaden its appeal among different social groups. Data from the Lokniti-CSDS (Centre for the Study of Developing Societies) post-poll surveys suggest that the party’s success in 2014 owed as much to its core support base of upper caste voters as it did to gain among Dalits, Adivasis, and Other Backward Castes, or OBCs.
Dalits and Adivasis seem to be moving away from the party, according to the latest Mood of the Nation survey conducted by Lokniti-CSDS. Upper castes and lower OBC voters continue to back the party in large numbers.