Desperately seeking Biden's replacement and finding … not much 

If you think Democrats have a problem convincing President Joe Biden to abandon his quest for a second term after his disastrous first presidential debate, consider their even bigger problem: Whom would they, or could they, pick to take his place?

And would any serious potential Democratic candidate accept the challenge this close to the election, especially with Vice President Kamala Harris and the progressive, identity-politics crowd screaming it was her turn? 

You know Democrats...