The ruling Congress party led coalition government has depended on regional political parties for support. Since winning elections over a BJP led government, the Congress party in India has depended on an alliance with Left and Marxist parties, then an alliance with regional parties from Tamilnadu, and now an alliance with the regional party of Mamata Banerjee in W. Bengal. Following three decades since independence in 1947, when the Congress party under Nehru and Indira Gandhi generally won large majorities in parliament, the situation has changed to where regional party support is needed for either the opposition BJP party or the Congress party to form a coalition government. This has reduced the flexibility of the coalition governments in setting policies to encourage foreign investment in the growing economy.
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