Answer: The crossing allows Sikh devotees from India to visit the gurdwara in Kartarpur, 4.7 kilometres (2.9 miles) from the India–Pakistan border on the Pakistani side without a visa.
The "Red Shirts" are mostly associated with the period that followed after the Reconstruction era of the United States of America. Although they were present from the year 1875 but they became most active after the Reconstruction era. So it can be said that during the late 19th century the "Red Shirts" were most active.
The correct answer to this open question is the following.
In my opinion, both major parties, Democrats & Republicans, eliminate third parties and their agendas because they exert dominant control over third parties and their candidates in that it is too much money Democrats and Republicans collect via donations from their followers. This money is used to organize and operate the political campaigns and buy all kinds of advertising through traditional media and social media. Third parties do not the money and infrastructure to represent a real threat to those two established and traditional parties in the United States. Among the third parties that have competed in US elections of the past, we find the Whig Party, Federalist Party, and National Republican Party, Populist Party, and Progressive Party.