KABUL, July 20 - (Reuters) - U.S. Democratic presidential candidate Barack Obama met Afghan President Hamid Karzai in Kabul on the second day of his visit to Afghanistan on Sunday, an official from the presidential palace said.

"He is in the palace and in the process of meeting Karzai and perhaps having lunch with him," the palace official said on condition of anonymity. (Editing by Alex Richardson)

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