No, not unless you negotiated some sort of right of return in your contract when you bought the car.
Here's some general "cooling off" info collected from the Edmunds Forums"
Door to Door Sales - There are cooling off periods for most door-to-door sales per federal and state laws. So if someone knocks on your door and sells you a vacuum cleaner, you generally can rescind that purchase within (typically) three days by giving the seller proper notice. If you contact the dealer for an internet quote, buy the car online and have it delivered to your driveway, you probably can't rescind the purchase (this is different from a salesperson showing up at your door trying to sell you something).
Federal Law/FTC Info - For federal information on cooling off periods see these websites:
Consumer Action Website
The Cooling-Off Rule: When and How to Cancel a Sale
California Used Car Purchases - In California, a used car buyer may obtain a two-day sales contract cancellation option. Fees and restrictions apply - see California's DMV site.
New Jersey Car Leasing - In New Jersey, if you lease a car, you have a one-day cooling off period to give you time to review the unsigned lease terms. New Jersey Consumer Affairs
Unwinding Deals - There are situations where a deal may be unwound. The dealer may not be able to obtain financing for you after you drive a car home and the dealer (not you) may unwind the deal. You may also have lemon law or warranty rights, or you may be able to claim dealer fraud. See Unwinding the Deal - What Are Your Rights? at Edmunds for more information.