RS polls: PM Modi steps up assault on Congress, eyes national supremacy

With Bihar, Modi gained 10 more upper-house seats

Prime Minister Narendra Modi's ruling alliance is stepping up its assault on the opposition Congress party as it looks to expand its national dominance and moves closer to securing a majority in the upper house of parliament.

Modi won the biggest mandate in 30 years in the 2014 general election, giving him control of the lower house. But his nationalist coalition still lacks a majority in the upper house that represents India's 29 states and has proven to be a stumbling block for its legislative agenda.

His Bharatiya Janata Party (BJP) has been chipping away at that problem. It recently