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Philippe P. Dauman

Why Viacom Chief Philippe Dauman is fighting his longtime boss, Sumner Redstone

Why Viacom Chief Philippe Dauman is fighting his longtime boss, Sumner Redstone

One question looms large as pressure mounts on Viacom Inc. Chief Executive Philippe Dauman: Why is the embattled executive waging a high-stakes war with his longtime boss?

Power, pride, principle -- and indignation -- all could be playing a part in Dauman’s campaign to remain a pivotal figure in Sumner Redstone’s $40-billion media empire, which includes Viacom Inc. and CBS Corp. 

After being ousted from the Sumner Redstone trust that eventually will oversee the mogul’s stock holdings, Dauman and a fellow Viacom board member took the extraordinary step...

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