In the 2021 West Bengal elections, the Trinamool Congress has faced its greatest challenge to date and has emerged with its strongest perfo...

In the 2021 West Bengal elections, the Trinamool Congress has faced its greatest challenge to date and has emerged with its strongest performance ever, both in terms of seats and vote share. With nearly 48% of the votes and 213 seats, the party improves on all its past performances (three seats remain to be contested).
In this article, we use the Triveni Centre for Political Data’s unique Indian Elections Dataset, derived from the Election Commission of India’s preliminary results (as published in the morning of May 3), treated and expanded by the TCPD team. We examine various measures of parties’ performance and place them in a historical context.
In the following chart, we compare the performance of major parties and alliance in the 2016 and 2021 election. We also include the 2019 results, split in assembly. This shows that even though the Bharatya Janata Party improved its presence in the state assembly compared to 2016, with 77 seats for 38% of vote share, this election is a setback compared to its 2019 performance, in which it won in 121 assembly segments, with 40% of vote share. A small decrease in vote share led to a significant drop of assembly segments (36%).

The major components of...