Supreme Court Hears Fiery Arguments In Case That Could Gut Public Sector Unions

Members of the American Federation of State County and Municipal Employees union, or AFSCME, listen to a council executive speak about conditions at state prisons and detention centers in Illinois.

Seth Perlman / AP

Updated at 2:31 p.m. ET

The Supreme Court heard fiery arguments Monday in a case that could remove a key revenue stream for public sector unions.

A sharply divided court could be poised to overturn a 40-year-old Supreme Court decision that would further undermine an already shrinking union movement.