Vice President Joe Biden announced that he won't be running for president in 2016 during a press conference at the Rose Garden Wednesday. “The window has closed," he said. “Though I will not be a candidate, I will not be silent." Biden said the mourning period for his son Beau has prevented him from launching a winning campaign, but cautioned that the next president should continue President Obama's work. “This nation will be making a tragic mistake if we attempt to walk away from the Obama legacy," he said.