Prime Minister Narendra Modi's ruling alliance could achieve a crucial majority in the upper house of parliament next year if some small regional parties join the bloc that recently won a massive mandate in the lower house, according to a projection by an independent research firm.
Dominating both houses is essential to pass controversial legislation that Modi's Bharatiya Janata Party (BJP) party has promised to its Hindu nationalist base, such as granting citizenship to non-Muslim immigrants from neighbouring Bangladesh and Pakistan.
The prediction by PRS Legislative Research, which tracks the functioning of India's parliament, shows that the BJP alone could

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