Arvind Patel, a US citizen who owns a popular sweetshop in New Jersey, has spent US$1,000 travelling to the Indian states of Gujarat, Uttar Pradesh and Assam this election season to campaign for incumbent Prime Minister Narendra Modi.The 53-year-old, who hails from Modi’s home state of Gujarat, knows that he cannot vote in the country’s marathon elections, which end on Sunday. No foreign citizen of Indian origin has that right.But that has not deterred him, or the hundreds of other like him,…