Throughout his political career, Joe Biden has backed pro-union policies, and his campaign made clear that union issues will be a prominent part of his presidential agenda. Biden is a strong proponent of the Protecting the Right to Organize (PRO) Act, which would expand or overturn labor laws that address such issues as prohibiting discrimination against workers who participate in strikes, revising definitions of employee classification, preventing employees from being required to attend meetings designed to discourage union membership and expanding penalties for labor law violations.