The decision does not rule on the merits of the law, known as HB20, but reimposes an injunction blocking it from taking effect while federal courts decide whether it can be enforced. The Supreme Court is likely to be asked to take a look at the constitutionality of the law in the future.
Five justices on the court voted to block the law for now. Justice Samuel Alito issued a written dissent from the decision, which was joined by two other conservative justices, Clarence Thomas and Neil Gorsuch. Justice Elena Kagan, a liberal, also voted to allow the law to remain in effect while a challenge to it is pending.
The law prohibits online platforms from moderating or removing content based on viewpoint. It stems from a common charge on the right that major California-based social media platforms like Facebook and Twitter are biased in their moderation strategies and disproportionately quiet conservative voices. The platforms have said they apply their community guidelines evenly and right-leaning users often rank among the highest in engagement.