Does this Court's ruling in United States v. Davis, 139 S. Ct. 2319 (2019) apply retroactively to defendant's raising motions to vacate their sentences under 28 U.S.C. § 2255?

Questions Presented For Review 1. Does this Court’s ruling in United States v. Davis, 139 8. Ct. 2319 (2019), striking as unconstitutionally vague the residual clause of 18 U.S.C. § 924(c)(3)(B), apply retroactively to defendant’s raising motions to vacate their sentences under 28 U.S.C. § 2255? 2. In cases with an ambiguous record as to the predicate crime of violence, can a conviction under 18 U.S.C. § 924(c) stand where one of the possible predicates—federal conspiracy under 18 U.S.C. § 371—no longer qualifies as a crime of violence? ii