Vice President Biden announced Wednesday that he will not run for president, ending months of feverish speculation over his 2016 plans and likely settling the Democratic field. Speaking in the Rose Garden alongside his wife Jill and President Obama, Biden said the window of opportunity to mount a viable campaign "has closed." He has been weighing a decision since summer, but cautioned all along that he and his family were grieving over the loss of his son Beau Biden -- and said Wednesday he knew that process could outlast the window for making a decision. "Unfortunately I believe we're out...