In a major public disagreement with Mayor Koch over the lack of support for his program to revitalize the South Bronx , Badillo resigned his post .
As a deputy mayor Badillo handled labor relations and community outreach for Koch .
In a major public disagreement with Mayor Koch over the lack of support for Badillo 's program to revitalize the South Bronx deputy mayor Badillo resigned his post .
As a deputy mayor Badillo handled labor relations and community outreach for Koch .