@ehBeth,
These are the telling two paragraphs from your link:
In a moving interview with comedian Stephen Colbert on Thursday night, Vice President Joe Biden suggested he is not yet emotionally prepared to run for president in 2016, as he is still reeling from the death of his son earlier this summer.
"I don't think any man or woman should run for president unless, number one, they know exactly why they would want to be president and, number two, they can look at folks out there and say, 'I promise you, you have my whole heart, my whole soul, my energy, and my passion to do this. And
I'd be lying if I said that I knew I was there," Biden told Colbert, who recently took the helm of on CBS' "The Late Show" from longtime host David Letterman.
Still doesn't sound like a definitive NO to me.