The presumptive prime minister of the world’s largest democracy promised a “shining India” in his victory speech Friday. Hindu nationalist Narendra Modi’s B.J.P. party swept the country’s national election in a landslide — the scale of which has not been seen since the 1980s. In the streets of New Delhi, Modi’s supporters celebrated his victory with fireworks, dancing and singing. But the pro-business leader faces huge challenges, including job creation that is not keeping pace with massive population growth. Many are also wary of Modi’s willingness to represent the country’s 175 million Muslims. Guest host Susan Page and her guests discuss the promise and challenges facing India’s next prime minister.