Look the only thing the federal government regulates in regards to traffic is safety related issues and environmental issues.
The feds can only encourage states to enact certain laws, they cannot force states to abide by any of their suggested requirements as it pertain to DWI's, Open conatainer laws, motorcycle helmet laws, BAC laws etc....
The federal government can regulate anything covered in the National Traffic and Motor Vehicle Safety Act
From Seat belts, directional flow of traffic, to speed limits.
You are too dumb for words.
Read the links I provided.
What is the National Traffic and Motor Vehicle Safety Act? Why are you getting so defensive? If DL are accepted in all 50 states why can't CCW be treated the same? One License is protected by the second amendment but is not accepted in all states and the other license is not protected but is accepted in all 50 states. Why are you arguing against me on this?