As their proposed merger inches forward, T-Mobile and Sprint have gained a few additional supporters. Key voices of support and opposition could indicate how difficult the nation’s third- and fourth-largest wireless network operators will have to battle to gain approval from the FCC, Department of Justice and other regulators.

The most notable group to come out in support of the merger this week is the National Taxpayers Union. “Our country is at a crossroads: we can either work to solidify America’s standing as a leader in technological innovation, or allow the status quo and its challenges with providing underserved communities digital access to persist,” Pete Sepp, president of the organization, wrote in a filing with the FCC (PDF).

Other organizations that came out in support of the merger recently include the Lincoln Independent Business Association (PDF), the Mid-Maine Chamber of Commerce (PDF) and the Olathe Chamber of Commerce (PDF). The latest round of public support arrived a few weeks after Dish Network, Frontier Communications, Windstream Services, Altice, C Spire and the Communications Workers of America all filed their opposition to the proposed merger with the FCC during the summer.