Ahead of Labor Day, major U.S. labor unions say they are considering work stoppages in support of the Black Lives Matter movement. (AP Photo/Jae C. Hong, File)NEW YORK Ahead of Labor Day, unions representing millions across several working-class sectors are threatening to authorize work stoppages in support of the Black Lives Matter movement amid calls for concrete measures that address racial injustice. Are we in conversation with our members and the national labor movement about how we escalate our tactics to stop fascism and win justice? Martin Luther King Jr. and Rep. John Lewis and was organized by A. Philip Randolph, a Black icon of the labor movement. That connection has only intensified because of the importance of workers of color, particularly African Americans, in the labor movement, Sugrue said.