Joe Biden Not Ruling Out a Challenge to Hillary Clinton

Friends say he'll decide in September.

US Vice President Joe Biden attends a reception for the 25th anniversary of the Americans with Disabilities Act (ADA) in the East Room of the White House in Washington, DC, July 20, 2015. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

Photographer: Saul Loeb/AFP/Getty Images

U.S. Vice President Joe Biden is continuing to assess whether to run against Hillary Clinton for the Democratic presidential nomination, and will probably make a decision next month, according to a person with knowledge of his thinking.

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