Run, Joe, run. Run because you have strengths that no other Democratic candidate does, including your depth of experience and connection to the Obama presidency. Run because your populist image fits the Democrats’ most successful political strategy of the past generation. Run because you will never have another chance — and because you are not afraid of losing. I get the case against Biden. My colleague Frank Bruni has made it and made it well, as have Vox’s Matthew Yglesias and others. At 76 years old, Biden does not represent an exciting new era. He is an old white guy...