Colorado’s secretary of state and attorney general have announced that they will ask the Supreme Court to review the Tenth Circuit’s ruling in Baca v. Colorado Department of State. That decision held that the federal constitution bars Colorado from disqualifying or penalizing presidential electors who vote for someone other than the candidate to whom they were pledged.
KDVR News has this story about the announcement, and you can also read about it at Colorado Politics. (Hat tip to Geoffrey Klingsporn).