The Brazilian and US labor movements are currently confronting common challenges related to changes in the overall structure and profile of the working class, the elimination of traditional sources of financing, and the weakening of allied political forces in the electoral arena. Considering these joint trajectories, the authors will examine recent efforts by US-based and Brazilian labor movement actors to create spaces for strategic collaborations, two-way learning, and mutual solidarity, to support common political goals and efforts towards union renovation. The article analyzes three contemporary cases of US-Brazil union solidarity networks, in order to better understand how transnational union activism influences national-level outcomes. The authors posit that the success of these forms of activism is dependent on objective limits created by external economic and political conditions, yet in some circumstances non-transactional solidarity is capable of producing unexpected positive outcomes for workers and their union organizations.

巴西和美国的劳工运动目前面临着共同的挑战，包括工人阶级整体结构和形象的变化、传统资金来源的消除以及选举领域结盟政治力量的削弱。考虑到这些共同轨迹，作者将研究美国和巴西劳工运动参与者最近为战略合作、双向学习和相互团结创造空间的努力，以支持共同的政治目标和工会革新的努力。本文分析了美国-巴西工会团结网络的三个当代案例，以便更好地理解跨国工会行动主义如何影响国家层面的成果。