What was so appalling about the conditions in chicago meat packing plants?

The Condition that was so alarming is they were known to overwork their employees, failed to maintain adequate safety measures, and actively fought unionization. Public burden to U.S. Congress led to the passage of the Meat Inspection Act and Pure Food and Drug Act, both passed in 1906 on the same day to ensure better regulations. 

the 9th amendment

explanation:

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else