 Walmart is the largest importer in the United States in many categories such as electronics and fast-moving consumer goods.The 2006 book "The Walmart Effect" by business journalist Charles Fishman contains much of the criticism, though it also enumerates Walmart's positive impacts within society.When Walmart plans a new store location, as often as not the company has to fight its way into town in the municipal equivalent of civil war between pro and anti Walmart factions.