Whether the 'knowingly or intentionally' mens rea in 21 U.S.C. § 960(a) applies to the drug type and quantity elements in 21 U.S.C. § 960(b)

QUESTION PRESENTED Whether, in light of Flores-Figueroa v. United States, 556 U.S. 646 (2009), Rehaif v. United States, 139 S. Ct. 2191 (2019), and Alleyne v. United States, 133 S. Ct. 2151 (2013), and the Due Process Clause, the “knowingly or intentionally” mens rea contained in 21 U.S.C. § 960(a) applies to the offense elements of drug type and drug quantity found in 21 U.S.C. § 960(b). 1