The New York Times is reporting that Vice President Joe Biden is beginning to explore a presidential campaign for 2016:

Vice President Joseph R. Biden Jr. and his associates have begun to actively explore a possible presidential campaign, an entry that would upend the Democratic field and deliver a direct threat to Hillary Rodham Clinton, say several people who have spoken to Mr. Biden or his closest advisers.

Mr. Biden’s advisers have started to reach out to Democratic leaders and donors who have not yet committed to Mrs. Clinton or who have grown concerned about what they see as her increasingly visible vulnerabilities as a candidate.