Ohio's Rob Portman, the only Republican senator to vote against the Tribal Labor Sovereignty Act, which would have taken away more than 600,000 American workers' rights to join a union.  Flickr/Creative Commons photo by the World Economic Forum.

The bill would have exempted any business or corporation partially or wholly owned by a Native American tribe from the National Labor Relations Act, which guarantees workers the right to join a union. It would have applied to all employees of those businesses, including non-tribal citizens. More than 600,000 workers would have lost protections guaranteed by the law, according to the AFL-CIO.

The House passed the union-busting bill in January, but it needed 60 votes in the Senate, where it fell five votes short of breaking a filibuster. It is unclear if the Senate will take it up again. President Trump had not voiced an opinion, but he was expected to sign the bill if it reached his desk. Among its supporters was the U.S. Chamber of Commerce.

“This was a great win for the IBEW and for all of labor,” said Austin Keyser, director of the Political and Legislative Affairs Department. “We fully support Native American tribes having sovereign power over their own governmental issues, but this bill had nothing to do with that. Instead, it was an attempt by rich and powerful interests to strip hundreds of thousands of Americans of their fundamental rights at work.”

Indeed, some tribal leaders made little attempt to disguise their intentions of eliminating union representation.

“I would liken it to what happened with the air traffic controllers strike a number of years ago to this country,” a representative for the Chickasaw Nation told a congressional hearing earlier this year. “We obviously are not on as large a scale, but that is the type of activity that would interfere with what we are doing.”

The IBEW saw that first hand. Diamond Bar, Calif., Local 47 represents about 30 slot-machine technicians at a casino owned by the Morongo Band of Mission Indians in Cabazon, Calif. The local union voted to ratify an agreement following contract negotiations, but negotiators for the tribe refused to recommend tribal members approve it because they had been emboldened by Congress’ potential action.

“It’s a very, very troubling step at a moment when we should be doing everything we can to try to protect people’s collective [bargaining] rights and where there are so many people who feel so disempowered in this economy,” Sharon Block, a former National Labor Relations Board member and now the executive director of Harvard Law School’s Labor and Worklife Program, told the New York Times.

Keyser thanked members for contacting their representatives and asking them to oppose the tribal act, noting that attendees during the annual Political Conference earlier this month made it a point of emphasis while lobbying on Capitol Hill.

“IBEW members understood this bill would have emboldened our opponents if they had been successful,” he said. “We certainly would have been targeted at some point. I’m really pleased with how we worked with our friends and allies to defeat this terrible piece of legislation.”

It wasn’t easy. Eight Senate Democrats, the majority of whom are up for re-election this year in states with large Native American populations, voted in favor of the bill. Ohio’s Rob Portman was the lone Republican to vote against it.

“I want to thank our members and supporters who contacted their representatives urging them to vote no,” International President Lonnie R. Stephenson said. “I’m convinced they made a difference, but we must remain vigilant. If we’ve learned anything, it’s that more attacks are coming from this Congress.”