Preheat the oven to 350°F (175°C).

In a large pot, boil the chicken breasts with skin intact in salted water for approximately 25 minutes, or until fully cooked.

Remove the boiled chicken from the pot and discard the skin and bones.

Shred the chicken into bite-sized pieces.

In the same pot of boiling water used for the chicken, cook the spaghetti noodles according to the package instructions.

Drain the noodles and set aside.

Spray a 9 x 13 inch baking pan with cooking spray.

Place the shredded chicken pieces, cream of chicken soup, grated Velveeta cheese, cooked spaghetti, and 1 1/2 cups of the chicken broth into the prepared baking pan.

Mix all the ingredients together until well combined.

Bake in the preheated oven for 35 minutes, or until the cheese is melted and bubbly.

Serve hot.