 CBS News special report. I'm determined on running. President Biden touched on foreign policy his decades in the Senate and cast his age, 81, as an asset in an almost one-hour news conference intended to stop the growing list of Democrats calling on him to abandon his campaign. But there were stumbles and gaffes. I wouldn't have picked Vice President Trump to be vice president, but I think she's not qualified to be president. More from CBS's Skyler Henry. Biden was asked about moves to cut the length...