The US Court of Appeals for the District of Columbia Circuit ruled against Anthropic AI's request to block the Trump administration's blacklisting efforts. The court, composed of three judges appointed by Republican presidents, including Donald Trump, denied the company's emergency motion but agreed to expedite the case, scheduling oral arguments for May 19. Anthropic argues that the blacklisting violates its First Amendment rights as it refused to allow its Claude AI models to be used for military purposes. The Trump administration, led by former President Trump and Defense Secretary Pete Hegseth, has labeled Anthropic a 'Supply-Chain Risk to National Security,' effectively prohibiting military contractors from engaging with the firm. The court acknowledged that Anthropic may suffer financial harm due to the blacklisting but concluded that the company did not sufficiently demonstrate that its speech was being suppressed during the litigation. In a parallel case, a federal judge in California granted Anthropic a preliminary injunction in March, indicating that the blacklisting may constitute unconstitutional retaliation. The Trump administration is currently appealing this ruling to the US Court of Appeals for the 9th Circuit.