New Delhi , India ( CNN ) -- Election results in four major Indian states Friday marked a momentous comeback for the country 's ruling Congress-led coalition , although it was undercut in one state by backlash against a graft-tainted coalition member . Analysts say the good showing for Prime Minister Manmohan Singh 's coalition is a much-needed boost for the government , battered by a series of corruption scandals , rising inflation , and low investor confidence in Asia 's third largest economy . In the eastern state of West Bengal , more than three decades of communist rule came to an end as the Congress alliance led by populist leader Mamata Banerjee won a landslide victory . The Communist Party of India also lost its strong hold in the southern state of Kerala . Analysts say the left 's Marxist economic policies seem increasingly outdated in the world 's second-fastest growing major economy . The only remaining red state in India is Tripura in the northeast , with a scant population of 3.6 million people . Meanwhile , in the southern state of Tamil Nadu , the federal coalition was defeated as its key ally , the Dravida Munnetra Kazhagam , lost its political monopoly . The DMK party has been badly hit by a multibillion-dollar telecoms corruption scandal that has cost the country up to $ 31 billion , according to a government audit . The man at the center of the scandal , A. Raja , is a DMK member and former telecoms minister . He was arrested last month for his alleged involvement in the selling of telecom licenses at rock-bottom prices . `` The DMK party has institutionalized corruption in Tamil Nadu for years and their defeat clearly shows voters will no longer tolerate corruption , '' said political analyst P. Nilotpal of the Center for Indian Political Research and Analysis . Tamil Nadu 's chief minister and the head of the DMK party , M. Karunanidhi , resigned after his party 's defeat . Karunanidhi 's daughter and DMK lawmaker M.L Kanimozhi also faces charges for her alleged involvement in the telecom scandal . A court will is expected to decide whether Kanimozhi will be sent to jail on Saturday . `` For the longest time , local elections in India were fought along caste or religious issues , '' Nilotpal said . `` But now people are awakened , they are saying no to politicians or political families who have dominated for so many decades . '' Analysts say these election results are crucial as the coalition will be in a better position to act on long-awaited reforms such as a new legislation on land acquisition . They say the regional elections could be considered a referendum ahead of the national elections in 2014 .
The regional elections give a boost to the prime minister 's government . Three decades of Communist Party rule end in West Bengal . But the coalition loses in Tamil Nadu as a scandal hurts the DMK party .