 CBS News special report. Vice President Kamala Harris begins her first full day campaigning for the top spot on the Democratic ticket, less than 24 hours after President Biden announced he was stepping aside. Former CBS News White House correspondent Peter Mayer. Her first order of business, of course, will be winning the nomination, and then she's going to have to choose her own running mate. Virginia Democrat Tim Kaine applauding Mr. Biden for a painful decision.