Since becoming VP and divisional merchandise manager for movies and music for the company's U.S. Wal-Mart Stores, Supercenters and Neighborhood Markets, David Porter has launched a series of initiativ

Since becoming VP and divisional merchandise manager for movies and music for the company's U.S. Wal-Mart Stores, Supercenters and Neighborhood Markets, David Porter has launched a series of initiatives to distinguish the giant merchant's music presence for consumers, while shaking up the competition.

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