Place chicken, broth, enchilada sauce, tomato sauce, green chilis and garlic powder in slow cooker. Cook on high 3-4 hours or until chicken is tender.
Remove chicken and shred.
Add drained beans, corn and shredded chicken to slow cooker.
Cook on high another 30 minutes.
Ladle into soup bowls and top with shredded cheese, crushed tortilla chips and a dollop of sour cream if desired.