And many of them are either hitting the picket lines or quitting their jobs as a result.

The changing dynamics of the US labor market, which has put employees rather than employers in the driver's seat in a way not seen for decades, is allowing unions to flex their muscle.

Flying into Phoenix Sky Harbor International Airport recently, I spotted the ramp workers on the tarmac, busily unloading bags and doing safety checks on the plane in 115 degree heat. Most passengers were anxious to deplane, ready to head to baggage claim, not giving a second thought to the work happening all around them to make their journey happen.

The executive council of the AFL-CIO held a special meeting last week to name their next leader, following the death of the labor federation’s longtime president, Richard Trumka. For the first time in the organization’s history, they chose a woman. Liz Shuler, 51, had served as the federation’s second-in-command under Trumka since they were elected together in 2009. Despite the sad and unusual circumstances of the succession ― Trumka died on Aug.