03/28/2008 02:45 am ET | Updated May 25, 2011

Arizona Governor To Endorse Obama

Arizona Gov. Janet Napolitano is endorsing Barack Obama for the Democratic nomination for president, The Associated Press has learned.

Napolitano planned to make her intentions known during a conference call Friday, according to an individual familiar with her plans who spoke on condition of anonymity because she hadn't publicly discussed the decision.

The endorsement is a major gain for Obama in his race against chief rival Hillary Rodham Clinton. One of several female governors, Napolitano is in her second term.

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