Welcome to the board! What's your pup's name? After you've posted a few more times, you'll be able to share photos.
Lab puppies at 8 months are at the peak of craziness,and I'm sure if he's partially husky, he's even more demanding. From your description, I will diagnose boredom. A dog that isn't kept physically and mentally active will find his own outlets. What is his daily schedule? How much exercise does he get every day, structured and unstructured? Even if you're not taking classes, training should be part of your every day life. Further details:
1. He's claiming you. What's your wife's role in training and working with him? She should do just as much, if not more, than you. I strongly encourage you to practice Nothing in Life is Free Dog Training: Nothing in Life is Free : The Humane Society of the United States
2. Most labs are no self-entertaining. Imagine if you were asked to just sit in a chair, all day, with nothing to look at , nothing to read, nothing to do, except for 30 minutes of some activity a day. You'd go berserk, too. Up the exercise, up the training. Until Kimber was 3, we took her to the dog park for 2 hours every single day, rain, snow, sleet, heat. Hiking is another wonderful activity to do with your dog. Leash walking is important to build up leash manners, but in general, it does little to get rid of energy. Toys that dispense meals, like Tug-a-jug and Buster cube, can be mentallly challenging and help.
3. What's the "just in case"? At 8 months, your pup should have enough control over his bladder to be know he needs to go outside and alert you about his need. Are you missing the cues? Are you not letting him out enough? Is he not signaling? What's going on here?
4. If you are giving him consistent exercise and training opportunities, then you can start training him to calm down. An important lesson for dogs is that while we're their whole worlds- and we need to really respect that- we also have to get other stuff done. Here's a really good guide on how to teach your dog to chill: How to teach your dog to chill out | The Peaceful Dog
Good luck!