I've known a few fanatical whitetail hunters and I'm sure someone if not several have pursued them in every state you can legally hunt them. That said, they aren't in legally huntable numbers in every state. California, Nevada, and Utah may have very small populations, but they can't be hunted. I don't know about Hawaii, plenty of axis deer, maybe someone snuck whitetails in to a ranch. I do know Alaska is starting to get some whitetails and mule deer crossing in from Canada and they are allowed to be shot on sight as they have the potential to carry diseases that negatively affect moose. And as mentioned above certain subspecies can't be hunted. Key deer in Florida are off limits, but there's plenty of whitetail elewhere in the state.