India's PM Modi faces election test as voting begins in Uttar Pradesh

By Douglas Busvine KAIRANA, India (Reuters) - More than 13 million Indians voted in the first stage of state assembly elections on Saturday, the biggest electoral test for Prime Minister Narendra Modi since coming to power in 2014. The world's biggest election this year began in Uttar Pradesh, the first of six stages that will elect an assembly to govern the impoverished state of nearly 220 million people. Modi's nationalist Bharatiya Janata Party (BJP) swept to victory in Uttar Pradesh three ye