DOJ Intervenes Alongside xAI Against Colorado's AI Act — First Deployment of the EO 14365 Litigation Task Force

The Justice Department moved to intervene on April 24, 2026 in X.AI LLC v. Weiser, No. 1:26-cv-01515 (D. Colo.), siding with Elon Musk’s xAI against the Colorado Artificial Intelligence Act. It was the first practical deployment of the AI Litigation Task Force created by Executive Order 14365, which this timeline recorded at its December 11, 2025 signing as a standing instrument for challenging state AI laws. The order created the capability; this is the capability being used.

The statute at issue is narrow. The Colorado AI Act requires companies deploying high-risk AI for consequential decisions — loans, insurance, employment — to take reasonable care to prevent algorithmic discrimination. It is a duty-of-care rule about automated decisions over people’s livelihoods, not a speech code and not a general AI regulation. xAI filed April 9 arguing the Act compels speech and discriminates by viewpoint under the First Amendment, burdens interstate commerce, is unconstitutionally vague, and violates equal protection.

The outcome arrived three days after the intervention, and it was not a ruling. On April 27 the court granted a joint motion — xAI, DOJ, and the Colorado Attorney General together — suspending enforcement of the Act. The order stayed enforcement pending both the close of Colorado’s 2026 legislative session and rulemaking, and a decision on a preliminary-injunction motion xAI need not file until 28 days after the Attorney General issues final implementing regulations or the legislature passes replacement legislation. The June 16 scheduling conference was canceled and all case deadlines suspended. The Act’s effective date had already slipped once, from February 1 to June 30, 2026.

What the posture actually accomplishes. No court has held the Colorado AI Act unconstitutional. No court has held that federal AI policy preempts state AI law — and the pre-suit legal analysis in this record is that an executive order alone does not preempt state law, a limit the administration’s own litigating position has to work around. Yet the Act is unenforced, on a timeline whose clock does not start until Colorado itself acts, agreed to by the state’s own Attorney General. The statute was suspended without being adjudicated.

That is the structurally interesting part, and it is a shape this corpus has recorded elsewhere: the operative question is not whether the challenged conduct is lawful but what the calendar does while the question is open. Here it runs the other direction from the election and detention cases — there, a correct ruling arriving late could not undo what had already happened; here, indefinite delay is itself the relief sought, and the merits may never be reached. A law that never takes effect does not need to be struck down.

Note also who is on which side. xAI holds a $200 million Pentagon Grok contract (July 2025) and has been the subject of congressional questions about classified-data access (March 2026). The federal government intervened as co-plaintiff in interest alongside a major federal AI vendor, against a state rule governing discrimination in lending, insurance, and hiring.

Sourcing note. Dates, docket number, case caption, and the terms of the April 27 order are consistent across Jenner & Block, Norton Rose Fulbright, and HR Dive, with DOJ’s complaint in intervention public at justice.gov. The complaint in intervention was not read in full here — DOJ’s specific preemption theory is characterized by the law-firm analyses, not quoted from the filing, and should be pulled before any piece leans on it. The capture ledger’s framing described DOJ as having “intervened” on April 24 without recording the April 27 stay; the stay is the consequential fact and is added here. The ledger’s claim that “five states have enacted counter-shield legislation” is not carried — it was not verified against a primary list, and per corpus discipline a count of that kind needs the statutes parsed state by state rather than inherited.