Sauté the cubed chicken breast in a skillet over medium-high heat until cooked through. Set aside.
Combine the Campbell’s Fiesta Spicy Nacho Cheese Soup, cream of chicken soup, milk, and enchilada sauce in a saucepan. Bring to a boil over low heat, stirring constantly to prevent scorching.
Serve topped with crushed tortilla chips and shredded cheddar cheese.