Whether Mr. Langford was improperly denied 28 U.S.C. § 2255 relief from his mandatory life sentence

QUESTION PRESENTED FOR REVIEW (1) Whether Mr. Langford was improperly denied 28 U.S.C. § 2255 relief from his “three strikes” mandatory life sentence, pursuant to United States v. Johnson, 135 S. Ct. 2551 (2015), where his determinative predicate conviction was pursuant to Iowa’s 1975 robbery with aggravation statute, which is indivisible, and which has never qualified as a “serious violent felony” under § 3559(c) in the absence of the residual clause, because conviction can be based on threats of nonphysical harm to property.