Outside the Supreme Court building, unionists waved signs with phrases like "Working people want a voice."
Under a Supreme Court dominated by conservatives, the First Amendment has been interpreted to protect the One Percent.
The U.S. Supreme Court appears poised to drastically rewrite not just labor law, but working conditions in the U.S.
In 1940, the U.S. Supreme Court ruled in Apex Hosiery Co. v. Leader that a sit-down strike was not a violation of the Sherman Anti-Trust Act.
Here are some recent lower court cases involving workers.
A Dec. 22 decision showed that men and women in black robes can yank away what workers win in the executive branch, on Capitol Hill, or at the bargaining table.
Two separate groups of union workers - public workers in Florida and American Airlines retirees nationwide - racked up big wins in separate courts in recent days.
Union leaders welcomed the NLRB's proposals. The right wing House GOP and the National Retail Federation screamed.
Richard Trumka said the Senate should "move expeditiously" to approve Obama's nominees for the U.S. Circuit Court of Appeals for DC.
In a brief announcement, the board said it would ask the justices to review the case, Noel Canning vs. NLRB.