Union density was 11.1 percent in 2014, the Bureau of Labor Statistics reported, but the workforce grew even more.
No union can survive without being able to win contracts and thus being able to make substantial changes in wages and conditions.
Overtime pay has increasingly moved to the top of labor's agenda because millions of workers are working overtime and not getting paid for it.
A panel of workers, a Laborer-turned-big-city mayor, a small business owner and others proposed practical moves for taking labor's "Raise The Wages," campaign nationwide.
The nation's largest labor federation, the AFL-CIO, rolled out here today its first- ever Raising Wages agenda.
Many of the people gathering in Washington this morning at the first-ever AFL-CIO National Summit on Raising Wages didn't have an easy time getting here.
McDonald's is one of the nation's largest low-wage employers, and its workers have been in the vanguard of the national movement for decent wages.
The report was done by Minnesotans for a Fair Economy and announced by Working America, an organization of some 3 million workers, including 300,000 in Minnesota.
For Amazon.com workers, the ruling means spending 25 minutes in line every day, unpaid, while waiting for a mandatory security check.
Delta Airlines' decision to fire a veteran baggage handler for speaking out in support of low-wage workers has elicited widespread criticism.