My guess......

In Ontario, there is an very active political organization called the Working Families Coalition made up of various trade and professional unions.  During the past four provincial elections, they campaigned hard for the Ontario Liberal party and spent huge amounts of money on attack adds against the Ontario Conservative party.  The expense for these adds were not included in the election spending quota's as they were deemed third party.

With one of the first orders of business was to reform some of the union funding and organizational changes that the previous gov't put in place, I would suggest that Mr Gerald Butts is looking to establish the Working Families Coalition as a federal force for the Liberals for the next election.