By Devjyot Ghoshal and Mayank Bhardwaj
NEW DELHI (Reuters) - Indian Prime Minister Narendra Modi is struggling to beat back his biggest political challenge in years from a protest movement which began with disgruntled farmers travelling to New Delhi on tractors and is now gaining wider support at home and abroad.
Simmering in makeshift camps housing tens of thousands of farmers since last year, the movement has seen a dramatic growth in recent weeks, getting backing from environmental activists, opposition parties and even A-list Western celebrities.
At its heart are three new farm laws passed by the government last September, thanks to the majority Modi's right-wing Bharatiya Janata Party (BJP) enjoys in the lower house of parliament.
"To frame this narrowly as agricultural frustration wouldn't explain the scale of what we are seeing," said Neelanjan Sircar, a political science professor at Ashoka University.
"This is about some larger frustration with how the government conducts business."
Since taking office in 2014, Modi's government has faced increased criticism for suppressing dissent, curbing consultation on major decisions and using its majority to drive legislation through parliament.
Led by farmers from India's northern Punjab state, the movement has spread to the country's northern and western farm belts and is now nearing its 100-day mark.
Sugarcane farmers from the politically important Uttar Pradesh state, who are suffering lengthy delays in crop payments, are joining forces with rice paddy and wheat growers from other states in opposing the new farm laws.
"Our protest will only get bigger in the weeks and months to come as more and more farmers are joining our movement from other parts of the country," said Joginder Singh Ugrahan, a farm leader from Punjab.
Western Uttar Pradesh's sizeable Muslim population, whose opposition to the Modi government's citizenship law in 2019 was quietened by heavy-handed policing, has allied with Hindu farm leaders to join the ongoing protests.
India's wider civil society, which has seen its ambit steadily narrow during Modi's term, has also thrown its weight behind the farmers' movement alongside academics and students.
Senior government officials said they didn't expect this level of pushback against laws intended to attract investment into India's vast agriculture sector.
The new farm laws allow private retailers to buy farm goods directly from growers, circumventing India's government-controlled wholesale markets. For over 60 years, Indian farmers have been selling grain to the government at state-guaranteed prices through these wholesale markets, and they say the new laws leave them at the mercy of large private retailers.
"The truth is that the laws were introduced to help Indian agriculture by revamping our dated and mothball post-harvest food supply chain," said a government official, who has been involved in talks with farmers, on condition of anonymity.
"But perhaps there was an issue with communicating that message to farmers," he added.
More recently, a wave of global support for the protests has complicated matters further for the Modi government.
Pop superstar Rihanna, Swedish climate change crusader Greta Thunberg and U.S. activist Meena Harris, the niece of U.S. Vice-President Kamala Harris, all tweeted in support of the farmers this month, drawing a rebuke from India's foreign ministry.
The subsequent arrest of Disha Ravi, a 22-year-old environmental activist linked to Thunberg, on sedition charges for creating and sharing an online document about the protests has only galvanized international support, advocacy groups say.
A Delhi court later granted her bail, citing a lack of evidence.
South Asian advocacy groups in the United States and Britain say they are lobbying those respective governments to pressure India to stop coming down hard on farmers and their supporters.
"We are pushing for more action from the U.S. government -particularly Congress - especially in the weeks ahead," said Satjeet Kaur, executive director of The Sikh Coalition in New York.
The Sikh Federation in Britain said more than 100,000 people had signed a petition urging lawmakers to discuss the way the Indian government was "harassing" farmers, said Jas Singh, an advisor to the London-based group.
(Additional reporting by Danish Siddiqui and Manoj Kumar in New Delhi and Rupam Jain in Mumbai; Editing by Ana Nicolaci da Costa)