Faced with a decrease in membership and some public criticism, unions are expanding their outreach to more than just existing or potential members.

Volunteers and paid workers at Working America, an organization backed by the AFL-CIO union federation, have been going door to door over the past couple of years in suburban neighborhoods around the country hit hard by de-industrialization and globalization. What's most interesting about the outreach is that most of the people they talk to won't ever be ...