WASHINGTON - The founder of the global News Corp. media empire, Rupert Murdoch, is suggesting that President Barack Obama isn't a "real black president."

Murdoch was praising Republican presidential candidate Ben Carson and his wife on Twitter Wednesday evening when he wrote: "Ben and Candy Carson terrific. What about a real black President who can properly address the racial divide?"

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Later, Murdoch recommended a New York magazine article asking whether Obama has done enough for the African-American community.

Murdoch is the founder of Fox News Channel, and News Corp's publications include The New York Post and The Wall Street Journal.

The 84-year-old Murdoch has praised Carson on Twitter before, calling him "irreproachable on background, achievements, character, vision."