The Left has has atrophied in West Bengal in just a decade, the BJP has been the primary beneficiary of this process

Vote share (in %) in Lok Sabha elections

Left Front here includes CPI (M), CPI, AIFB and RSP, the four major LF partners since 1980. The CPI and CPI(M) did not have an alliance up to 1977 assembly elections.

Chart: Roshan Kishore Source: TCPD, Asoka University Get the data