Speculation about Joe Biden entering the 2016 race has been heating up of late, and Politico adds a new wrinkle: The 72-year-old is reportedly considering a run as a one-term president. "One thing that I keep hearing about Biden is that if he were to declare and say, because age is such a problem for him if he does, I want to be a one-term president. I want to serve for four years, unite Washington," journalist Carl Bernstein told CNN. “It could light fire to the current political environment.” Biden is on vacation in South Carolina this week, and the Wall Street Journal reports that he's using the time to sound out supporters. (You can also add Al Gore's name to the rumor mill.)