Set slow cooker on high heat and add tomatoes and tomato sauce. Top with black beans, kidney beans, green chiles and corn.
Next, add in all of the seasonings: cumin, chili powder and taco seasoning. Stir everything in the slow cooker until combined.
Add chicken (do not mix in), Velveeta and then the milk. Place the lid on the slow cooker and cook on high 3-4 hours.
Add chicken breast directly on top of the tomato mixture.
Add Velveeta cubes on top of the chicken.
Remove lid and stir to combine.
Keep slow cooker on warm and serve.
Great as a dip with taco chips, tortillas, crackers or even make as a topping to a burrito or taco salad.