1Spray inside of 3- to 4-quart slow cooker with cooking spray. In slow cooker, mix cheeses, pasta sauce and wine.
2Cover; cook on High heat setting 45 to 60 minutes.
3Stir until cheese is smooth. With rubber spatula, scrape down side of slow cooker to help prevent edge of fondue from scorching. Reduce heat setting to Low. Serve fondue with bread cubes and wooden picks or fondue forks for dipping. Fondue will hold up to 4 hours.