In 4-quart saucepan, cook beef and onion over medium-high heat 5 to 7 minutes, stirring frequently, until beef is brown; drain.
Stir tomatoes, enchilada sauce and corn into beef. Heat to boiling; reduce heat to medium-low. Cook 10 minutes, stirring occasionally.
Stir in beans. Cook 5 to 8 minutes, stirring occasionally, until thoroughly heated. Sprinkle individual servings with corn chips.