ATLANTA (REUTERS) - US Vice-President Joe Biden said on Thursday that he is trying to determine whether he has the emotional energy to mount a White House bid in 2016 but cannot say yet whether he can do it.
In his first extensive comments about a possible run for the Democratic presidential nomination, Biden said: "I can't look you straight in the eye now and say I know I can do it."
Biden, 72, has been huddling with advisers for weeks to determine whether he will challenge Democratic frontrunner Hillary Clinton, who has seen her favourability ratings plummet over her use of a private email server while working as the nation's top diplomat.
"The most relevant factor in my decision is whether my family and I have the emotional energy to run," said Biden, who lost his son Beau to cancer earlier this year.
"The factor is, can I do it?"
"The honest to God answer is I just don't know."
Biden was in Atlanta on Thursday night to deliver a foreign policy lecture.