Did the Ninth Circuit's disposition of Petitioner's Rule 403 claim, based on the district court's having abused its discretion by rejecting his proffered stipulation that would not only have conceded several essential elements under 18 U.S.C. § 2252, but also would have permitted a government agent to testify narratively to the jury about what certain images and videos depicted, conflict with Old Chief's rule?

Did the Ninth Circuit's disposition of Petitioner's Rule 403 claim, based on the district court's having abused its discretion by rejecting his proffered stipulation that would not only have conceded several essential elements under 18 U.S.C. § 2252, but also would have permitted a government agent to testify narratively to the jury about what certain images and videos depicted, conflict with Old Chief's rule?