Joe Biden’s advisers have started to contact Democratic leaders and donors who have grown concerned about what they see as Hillary Rodham Clinton’s vulnerabilities as a candidate.
Vice President Joe Biden and his associates have begun to explore a possible presidential campaign, an entry that would upend the Democratic field and deliver a threat to Hillary Rodham Clinton, say several people who have spoken to Biden or his closest advisers.
Biden’s advisers have started to contact Democratic leaders and donors who have not committed to Clinton or who have grown concerned about what they see as her increasingly visible vulnerabilities as a candidate.