Preheat a panini style grill. Lightly grease with nonstick spray.
For the slaw: Mix all ingredients in a bowl. Let sit until ready to serve. Season with salt and pepper to taste before using.
In a pot over medium heat, add the broth, chipotle, garlic powder, chili powder, and season well with salt and pepper. Whisk until combined. Add the chicken and cover with a lid. Bring to a simmer until the chicken reaches an internal temperature of 160°F using a thermometer.
Remove the chicken, using 2 forks pull the chicken apart to shred. Return the chicken to the pot and continue to simmer to absorb more flavor for a few minutes. Adjust the seasoning with salt and pepper to taste. Reserve the liquid for dipping.
Place the shredded chicken on the bread, spread 1 to 2 teaspoons of the cooking liquid over, and top with slaw. Cook the sandwich on the panini grill until both sides are golden brown.
Cut in half and serve with a side of the sauce, pickles and chips.