GOP lawmakers wanted to force public-sector unions to hold recertification elections every two years.
In her withering dissent in Janus v. AFSCME, the justice said her colleagues ignored precedent and "weaponized" the First Amendment.
The Janus v. AFSCME decision means the entire U.S. public sector will now be "right to work," and the political ramifications will be felt for years to come.
Conservative justices appeared sympathetic to the challenge brought by anti-union groups.
The so-called "Panama Papers" scandal reminds us that concealing wealth and avoiding tax payments is neither uncommon nor -- in many cases -- illegal. But the embarrassing leak exposes something else.
Sometime during the next few months, the US Supreme Court will issue a decision that could profoundly weaken public employee unions across the country.