12-11-16 CNN: Biden keeps door open for 2020 run against Trump: “who knows where we’re going to be”
12-7-16 CNN: Biden: ‘I have no intention of running’ in 2020
12-5-16 The Hill: Biden raises possibility of 2020 presidential bid
12-1-16 USA Today: After Hillary Clinton’s loss, who could be Madam President?
11-27-16 Washington Post: The race for the 2020 Democratic presidential nomination is now open