There are several. First, I think, is the commerce clause in Article 1, Section 8, Clause 2, which states that Congress has the power to regulate commerce among the several states. If California had a law that forbade out-of-state drivers from entering California if the person did not have a California license, that would be a severe restriction on interstate commerce. State laws that interfere with interstate commerce are unconstitutional. See Gibbons v. Ogden. Another basis is Article 4, Section 1, which states that full faith and credit shall be given in each state to the publics acts, records and judicial proceedings of every other state. So if NY licenses a driver, California must honor it. Also, Article 4, Section 2 states that the citizens of each state shall be entitled to all priveleges and immunities of citizens in the several states. So again, if the person can drive in NY, he/she can drive in California. Anyone with a current drivers license may temporarily drive anywhere they choose within the US since the basic laws of the road are the same in each state. Individually, it is the states that govern how long you may do so. The length of time varies from state to state and can range from six months to two years. Driving is a priviledge afforded by the state, not a right and is therefore not cited in the Constitution.
No. You can legally only possess a drivers license from the state you reside in. It would make no difference anyway - all states share their DMV information with one another and honor each other's court decisions.
No
No
Yes
You need to be 18 to get you drivers license but when you are 16 you can drive with a guardian that has a drivers license.
Not legally.
Short answer, none.
No. You can only get a California license if you're a resident of California.
No
No
if i have a ticket in California can i get a drivers license in Kentucky
If your license in suspended you can't legally obtain a driver's license anywhere else in the USA.