The PR blitz comes as critics of Wal-Mart are stepping up their own campaigns. The New York Times is reporting that a new coalition of about 50 groups — including unions, environmentalists, community organizations, state lawmakers and academics — is planning the first coordinated assault against the company’s business practices. Groups involve include the AFL-CIO, the Sierra Club and the National Partnership for Women and Families. Also on Tuesday, the United Food and Commercial Workers International Union announced the launch of its new website at wakeupwalmart dot com.