A federal court stays Colorado's AI law
On 27 April 2026 a magistrate judge of the U.S. District Court for Colorado granted a joint motion by xAI, the United States and Colorado Attorney General Philip Weiser: the Attorney General may not pursue violations of Colorado's AI Act (SB24-205) occurring before fourteen days after the court rules on xAI's forthcoming motion for a preliminary injunction. Three days earlier the United States had intervened in the case as a plaintiff.
Why it matters
For the first time the U.S. federal government formally joined, as a party, litigation against a state AI law, on Equal Protection grounds, and secured a temporary stay of its enforcement before its effective date. An editorial assessment: the order does not resolve the underlying dispute.
xAI filed suit on 9 April 2026, challenging SB24-205 - Colorado's law on algorithmic discrimination in high-risk AI systems, due to take effect on 30 June 2026 - as a violation of the right to equal protection of the law. On 24 April the United States filed an unopposed motion to intervene as plaintiff: the Acting Attorney General certified the case as one of general public importance under 42 U.S.C. 2000h-2 of the Civil Rights Act of 1964; the court granted the motion the same day and ordered the United States' complaint docketed as a separate entry. The same day all three parties - xAI, the United States and Colorado Attorney General Philip Weiser - filed a joint revised motion: to vacate the case's scheduling conference (set for 16 June) and suspend procedural deadlines, on condition the law would not be enforced meanwhile. On 27 April Magistrate Judge Cyrus Chung granted that motion by order: the Colorado Attorney General shall not pursue enforcement of SB24-205 (or any law replacing it) for violations occurring on or before fourteen days after the court rules on xAI's forthcoming preliminary-injunction motion; xAI must file that motion within 28 days of final rulemaking under SB24-205 or its successor; the conference was vacated; the parties' original, narrower joint motion (without the United States, also filed 24 April) was denied as moot. What the record does not claim. The order does not resolve the underlying dispute: it is a procedural stay while the Attorney General's rulemaking proceeds and before the court rules on the forthcoming preliminary-injunction motion; the court did not hold SB24-205 unconstitutional. The docket entry this record was first located by, no. 22, is the parties' own motion, not a court order; the order granting it is the separate docket entry no. 24.