John L. Lewis reacting to challenge

Steel published a bold advertisement in 375 newspapers, asserting the right of its employees to work without joining unions organized by outsiders. This move was seen as an arrogant act akin to a dictatorship, prompting organized labor to accept the challenge. The labor movement vowed to fight for economic freedom and industrial democracy against the powerful steel industry.

In what way does the text characterize the relationship between Steel and its employees?

What does the phrase 'omnipresent overlords of steel' imply about the power dynamics in the industry?