Justice Thomas:

“Today’s digital platforms provide avenues for historically unprecedented amounts of speech, including speech by government actors,” Thomas wrote. “Also unprecedented, however, is the concentrated control of so much speech in the hands of a few private parties. We will soon have no choice but to address how our legal doctrines apply to highly concentrated, privately owned information infrastructure such as digital platforms.”

“Applying old doctrines to new digital platforms is rarely straightforward,” Thomas added. “Respondents have a point, for example, that some aspects of Mr. Trump’s account resemble a constitutionally protected public forum. But it seems rather odd to say that something is a government forum when a private company has unrestricted authority to do away with it.”