Biden would be a weak candidate with gaffes every second.
Maybe Kerry would be pushed by Obama to replace Hillary.
The Hillary campaign seems desperate and weak. The media looks desperate and weak with their support of a flawed candidate. The low turn out could influence Congress and Senate races unless someone can generate some energy into the Presidential campaign. So far, only Trump and Cruz are creating some enthusiasm. The Democrats are promoting possible criminal activities, if they support people who are under investigation for wrong doing.
Biden has been VP for 8 years. He would gladly take on the mantle of Obama's third term. Obana would campaign enthusiastically for Biden. He would be a far more formidable candidate than Hillary. Biden destroyed Ryan in the VP debate in 2012. The unions and minorities like Biden better than Hillary.
Maybe Kerry would be pushed by Obama to replace Hillary.
Seriously doubt it.
So far, only Trump and Cruz are creating some enthusiasm.
Trump and Sanders are the ones generating enthusiasm. No one else's crowds approach their numbers.
Biden is a laugh a minute. But the media would support him and he’s much more likable than Hillary.