Did the appeal waiver in Petitioner's plea agreement foreclose an appeal claiming that his sentence was illegal on its face and could not lawfully be imposed on any defendant?

While “jurisdictions appear to treat at least some claims as unwaivable” via an appeal waiver in a plea agreement, this Court has not yet had occasion to make a “statement…on what particular exceptions may be required.” Garza v. Idaho , 586 U.S. 232, 238 & n.6 (2019) . This Petition asks this Court to consider one such potential exception: a n appeal alleging an illegal sentence. Several circuits permit such appeals notwithstanding an appeal waiver in a plea agreement. The Sixth Circuit below, however, refused to do so. This Court should resolve the conflict by answering the following question: 1. Did the appeal waiver in Petitioner’s plea agreement foreclose an appeal claiming that his sentence was illegal on its face and could not lawfully be imposed on any defendant ?