1. 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. § 841(a) applies to the offense elements of drug type and drug
quantity found in 21 U.S.C. § 841(b).

2. Whether the Fourth Amendment standards for traffic stops articulated in
Rodriguez v. United States, 135 S. Ct. 1609 (2015), apply to immigration-checkpoint stops.

Whether the mens rea requirement in 21 U.S.C. § 841(a) applies to drug type and quantity