That's a big NO. There are some states that will never recognize your conceal carry permit even if it was signed by the president. You'll be treated like a criminal if you're in California or New York, and they wonder why their gun crime rate is so high.
Greetings, I agree with the previous person and can tell you that not every state law will allow you to freely carry a gun (or rather concealed carry). Many states have severe penalties for doing so, and you may even be imprisoned. I've lived in Delaware for 28 years. In order to keep myself and my family safe in case of an emergency, I decided to buy a gun. First, I read about Delaware gun permit and began the process of obtaining a permit. This process was not so long, but need to wait about 4 months.