The 1894 Pullman strike involved a union tactic that is now illegal. What was the tactic?

The 1894 Pullman strike involved a union tactic that is now illegal. What was the tactic?
 
  a. Workers protested conditions in Pullman Town..
  b. The American Railway Union undertook a secondary boycott.
  c. Pullman was a union shop.
  d. Collective bargaining took place.
  e. The union sought an injunction.

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Unions exert political power through all except one of the following. What is the exception?
 
  a. registering voters
  b. encouraging workers to vote
  c. using union resources in political campaigns
  d. lobbying for legislation favorable to workers
  e. developing their own political party