Heat two tablespoons olive oil in a skillet over medium heat.
Sprinkle the chicken with salt and pepper and place in the skillet. Cook for 4-5 minutes or until the chicken is starting to brown. Remove from the skillet and place on the bottom of the slow cooker.
Add the remaining oil to the pan and add the onion, carrots, and celery. Saute for 5 minutes or until they begin to soften. Add the vegetables to the slow cooker.
Add the garlic, oregano, Italian seasonings, both cans of tomatoes, chicken broth, sugar, and wine to the slow cooker.
Stir everything to combine then put the slow cooker on low, cover, and let cook for 8 hours.
Before serving cook the pasta according to the package directions. Drain and keep warm.