Article VI Sec 2 When a state law conflicts with Federal law the Federal law prevails. That was settled in that little hoorah between 1861 & 1865. That celebration of northern industrial might.
Correct, it’s no different with these States that have “Legalized” marijuana.
They have passed legislation that the use and or possession of Marijuana is not a crime in their State.
But it is still 100 % illegal according to the a federal government.
Although the State can refuse to enforce Federal Marijuana laws they cannot preclude Federal Law enforcement from entering their state and enforcing Federal law.
Several examples of Pot growers and sellers being arrested by the Feds in states that have “legalized” marijuana, especially when firearms are involved.
