Democrats' plan B: Biden as a one-term president with Warren as his VP

Biden has another card to play in soliciting Warren’s support. He would be 74 years old if he were elected president in 2016, an issue he may have a way of addressing. “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. I’ve dealt with the Republicans in Congress all my public life,’” liberal journalist Carl Bernstein told CNN this month.

A one-term pledge by Biden would also interest Elizabeth Warren. She is 66 years old, and if a Democrat wins in 2016, she will be 74 herself by the time someone else has served two terms in office — and facing her own age issues. But if Biden won, after pledging to serve only one term, Warren would be the front-runner for the Democratic nomination in 2020. If Biden made her his vice-presidential choice, as Yale’s Professor Kahn and others have suggested, she might be a virtual lock for the Democratic nomination.