Multiple sources address efforts to rebuild a strong union movement, emphasizing solidarity as a foundational element. The articles present the general idea that strengthening unions requires renewed organizing and collective action among workers. They frame “building back” as a process aimed at restoring union power and participation, rather than describing a specific policy proposal or event. One source highlights that the effort begins with deep solidarity, suggesting that unity among workers is central to persuading more people to join and to sustaining coordinated bargaining and advocacy. The coverage is largely thematic, focusing on the motivation and organizing approach rather than citing detailed statistics, named legislation, or particular union campaigns. Across the pieces, the common thread is that a successful union revival depends on sustained commitment to shared interests and collective engagement. Overall, the sources provide a high-level perspective on how union movements may regain strength, while leaving specifics—such as timelines, targeted industries, or concrete legislative actions—largely unspecified.