Joe Biden says he's confident Hillary Clinton will become the Democratic nominee and "the next president." But he definitely planned to run, he tells ABC News, and believed "I would have been the best president." That plan derailed when his son Beau died of brain cancer last May, but Biden says he's comfortable with his decision not to run. "No one should ever seek the presidency unless they're able to devote their whole heart and soul and passion into just doing that," he says.
"Beau was my soul. I just wasn't ready to be able to do that," he adds. His $1 billion Cancer Moonshot initiative seeking improved cancer treatments "allows me to pour all my energies into doing something that hopefully will [save the life of someone] diagnosed with what my Beau was diagnosed with," he says. "We are going to fundamentally change the face of cancer. It's going to become a chronic disease. We're going to cure a hell of the lot of it that's not chronic," he adds, per ABC News. (Read more Joe Biden stories.)