The interview is unlikely to help for reasons that are only too obvious, the least of which is that it is not live. But it can hurt: every pause, every uhh, every squint will be analyzed and highlighted as evidence of Biden’s diminished condition.
And that’s the problem generally: I don’t believe there’s anything Biden can really do to undo the damage the debate caused (or laid bare, if you prefer) short of having Jesus himself performing a miracle and turning him into a hyper-virile 35-year old with his original teeth on national TV. And even then, people may still be wary.
This reeks of desperation from a team following a playbook that’s been torn up since Donald Trump’s first campaign and decimation of the Republican field first and Hillary Clinton second.