Whether, under McFadden v. United States, a defendant who pleads guilty to knowingly distributing a controlled substance must admit that he knew the substance was listed on federal drug schedules or that he knew the identity of the substance

Question Presented 1. Under McFadden v. United States, ---U.S.---, 135 S.Ct. 2298 (2015), when a defendant pleads guilty to “knowingly” distributing a controlled substance (or conspiring to do so), must the trial court, in determining that the defendant understands the nature of the charge and making sure there is a factual basis in support of the plea, make sure the defendant understands and admits either (1) although he didn’t know the name of the substance, he knew it was listed on the federal drug schedules, or (2) he actually knew the identity of the substance? i