Slow Cooker Chicken Taco Soup
1 onion, chopped
2 (10 oz) cans diced tomatoes with green chilies
1 (16 oz) can pinto beans, undrained
1 (15 oz) can black beans, undrained
1 package taco seasoning or 4 tablespoons
1 (15 oz) can whole kernel corn, drained
4 skinless, boneless chicken...