Vice President Joe Biden said Wednesday that he will not run for president, giving a boost to Hillary Clinton's White House bid.
Biden made his announcement at the White House Rose Garden, standing with his wife, Jill, and President Barack Obama.
He cited the death of his 46-year-old son, Beau, who died of brain cancer in May.
"As my family and I have worked through the grieving process, I've said all along what I've said time and again to others, that it may very well be that that process, by the time we get through it, closes the window on mounting a realistic campaign for president," Biden said. "I've concluded it has closed."