Police in New Delhi detained scores of demonstrators on Saturday, a day after hundreds were held on Friday, as youth-led and opposition-backed protests continued demanding the resignation of Chief Election Commissioner Gyanesh Kumar. Protesters say a nationwide revision of electoral rolls has removed millions of eligible voters and favours Prime Minister Narendra Modi's governing party, while the Election Commission (the constitutional body that runs India's elections) says the exercise aims to remove duplicate, deceased or ineligible entries. The rallies, which have spread to cities including Mumbai and Hyderabad, are among the biggest challenges to Modi in his 12 years in power; Kumar has not publicly responded.