Brown sausage in a skillet over medium heat. Remove to your crockpot.
Add the onion, garlic, celery and carrots to the hot pan and cook until softened, about 3 minutes.
Stir in the tomato paste and the Italian seasoning. Pour the white wine (or 1/2 cup chicken broth) into the pan and bring it to a boil, scraping the browned bits off the bottom of the pan. Add the broth, tomatoes, and tomato sauce and bring to a boil. Take off the heat.
Carefully transfer to a 5-6 quart slow cooker together with the remaining ingredients EXCEPT for the orzo pasta, white beans and kale/spinach.
Cook on LOW for 6-8 hours or on HIGH for 3-4 hours. Stir in the remaining ingredients and cook on HIGH for about 15 minutes or until the pasta is done.