NEW DELHI — India’s opposition parties took their fight over a sweeping voter-roll revision to the Supreme Court on Monday, submitting a petition that alleges irregularities and demands the resignation of Chief Election Commissioner Gyanesh Kumar. Congress leader Rahul Gandhi joined thousands of supporters, students and other protesters in the march through the capital. Gandhi briefly rode in an open bus while holding a copy of India’s Constitution and called the demonstrations a defense of the country’s constitutional system. “We will not back down,” Gandhi told reporters. The dispute centers on a nationwide review of voter lists that began last year. Election authorities have removed more than 130 million names. Opposition parties and other critics say the process is politically motivated and risks stripping eligible people of their right to vote. The Election Commission and Modi’s Bharatiya Janata Party reject claims of manipulation, saying the changes are intended to remove duplicate and ineligible registrations. The march followed a weekend police crackdown in New Delhi, when thousands of activists were briefly detained, including leaders of the youth group known as the “Cockroach” movement and journalists. Authorities had restricted large-scale demonstrations across much of the capital. The dispute has become a broader test of trust in India’s election administration. The “Cockroach” movement has helped drive protests since the voter-list revision began, and opposition parties are seeking to channel that public anger into pressure on the government and the election chief. Modi has not publicly addressed the demonstrations; some governing-party leaders have dismissed activists as “anarchists.” Ahead of Monday’s march, authorities closed six metro stations and warned of traffic disruption. New Delhi police also announced that Jantar Mantar, a longtime gathering place for demonstrations, would no longer be designated for rallies, naming three replacement locations.