Lawmakers in Indiana,Michigan and Ohio have also proposed limits on unions representing public employees.

VOA: special.2011.02.25

The fact that none (emphasis provided by the Judge) of the public employee unions falling into the general category endorsed Walker in the 2010 election and that all (emphasis provided by the Judge) of the unions that endorsed Walker fall within the public safety category certainly suggests that unions representing general employees have different viewpoints than those of the unions representing public safety employees.

FORBES: Federal Judge Strikes Down Part Of Scott Walker's Anti-Collective Bargaining Law

Airlines and unions representing airport employees have been pushing for a resolution in Congress.

BBC: Congress passes bill to end widespread airline delays

Unions representing most ambulance staff recently voted to reject a deal to resolve the dispute.

BBC: Scottish Ambulance Service rest breaks statement