President Donald Trump lost a major Twitter fight Tuesday when a federal appeals court said that his daily musings and pronouncements were overwhelmingly official in nature and that he violated the First Amendment whenever he blocked a critic to silence a viewpoint.

The effect of the 2nd U.S. Circuit Court of Appeals decision is likely to reverberate throughout politics after the Manhattan court warned that any elected official using a social media account “for all manner of official purposes” and then excluding critics violates free speech.

“The government is not permitted to ‘amplify’ favored speech by banning or burdening viewpoints with which it disagrees,” the appeals court said.

Because it involved Trump, the ruling is getting more attention than a January decision by the 4th U.S. Circuit Court of Appeals that found a Virginia politician violated the First Amendment rights of one of her constituents by blocking him from a Facebook page.

Still, the appeals court in New York acknowledged, not every social media account operated by a public official is a government account, and First Amendment violations must be considered on a case-by-case basis.

“The irony in all of this is that we write at a time in the history of this nation when the conduct of our government and its officials is subject to wide-open, robust debate,” Circuit Judge Barrington D. Parker wrote on behalf of a three-judge panel.

The debate generates a “level of passion and intensity the likes of which have rarely been seen,” the court’s decision read.

“This debate, as uncomfortable and as unpleasant as it frequently may be, is nonetheless a good thing,” the 2nd Circuit added. “In resolving this appeal, we remind the litigants and the public that if the First Amendment means anything, it means that the best response to disfavored speech on matters of public concern is more speech, not less.”

The Department of Justice is disappointed by the ruling and is exploring possible next steps, agency spokesperson Kelly Laco said.

“As we argued, President Trump’s decision to block users from his personal twitter account does not violate the First Amendment,” Laco said in an emailed statement.

Appeal options include asking the panel to reconsider, or seeking a reversal from the full 2nd Circuit or from the U.S. Supreme Court.

The decision came in a case brought by the Knight First Amendment Institute at Columbia University. It had sued on behalf of seven individuals blocked by Trump after criticizing his policies.