Still, while Mr. Modi’s party has sometimes struggled against strong regional parties in state and general elections, consolidating any of them into a proper opposition to challenge Mr. Modi’s grip on India would not be an easy or quick process. And Congress, the largest opposition party with a national presence, has appeared increasingly vulnerable.
With exit polls indicating that the races in both Goa and Uttarakhand would be tight, leaders of Congress flew into both states in recent days to try to head off any last-minute “poaching” by the B.J.P. — that is, attempts to persuade winning candidates to switch sides. In 2017, the B.J.P. used such tactics to form the government in Goa, even though Congress had won a plurality of the seats.
This time, prominent members of Congress gathered at a Goa hotel for what party leaders said was a birthday celebration for one of them, and its candidates were offered rooms overnight. Indian media reports said it was an effort by the party to stick together and block last-minute maneuvers by the B.J.P.
“Nobody can poach us even if they try their best,” said Girish Chodankar, the Congress president in Goa. “We have taken all kinds of precautions.”
Much of the attention during the election season has been focused on the prize state of Uttar Pradesh, not just because of its size but because of how consequential it could be to the future of Indian politics.