But the union, the American Federation of State, County, and Municipal Employees said the case was ultimately a political attack by Rauner against unions.

\"We are extremely disappointed the Supreme Court has taken the side of the powerful few, but we’re more determined than ever to keep our union strong, standing up for public services and the working people who provide them,” AFSCME Council 31 Executive Director Roberta Lynch said in a statement.

One expert on labor and education said the decision could diminish collective bargaining, which has attracted more attention because of the teachers' strikes in multiple states over the last year.

\"We can now expect to see more chaotic labor relations in the public sector as formal collective bargaining may diminish. The teacher strikes and walkouts in West Virginia, Oklahoma, and Arizona demonstrate that these workers will continue to act collectively, with or without formal rights granted by the government or the Constitution,\" said Rebecca Kolins Givan, an associate professor at Rutgers School of Management of Labor Relations.

The AFL-CIO, a group of 55 national unions, said the Court's decision \"joined the corporate attack on working people\" and the group's secretary tweeted that it proves the decision was politically motivated.

I used to think the Supreme Court was the last institution left that was impervious to politics — but this proves otherwise. Now we have to fight even harder, come together and mobilize — working people will never stop demanding accountability! #1u https://t.co/iWoCISItso

— Liz Shuler (@lizshuler) June 27, 2018

Justice Elena Kagan said in her dissent that the majority took sides in ongoing disputes over the role of unions that should have been decided through the democratic process because Illinois and other states have their own laws about union fees.

\"Speech is everywhere – a part of every human activity (employment, health care, securities trading, you name it). For that reason, almost all economic and regulatory policy affects or touches speech. So the majority's road runs long. And at every stop are black-robed rulers overriding citizens' choices. The First Amendment was meant for better things,\" Kagan said.

Kagan said a previous Court ruling related to this case barred unions from using fees from nonmembers to support political candidates or ideological causes because those expenses are not related to collective bargaining.

But President Donald Trump tweeted that the ruling hurts Democrats because non-union employees would not be required to support candidates supported by their union.

Supreme Court rules in favor of non-union workers who are now, as an example, able to support a candidate of his or her choice without having those who control the Union deciding for them. Big loss for the coffers of the Democrats!

— Donald J. Trump (@realDonaldTrump) June 27, 2018
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