When will the Democrats pull the plug on ‘Plugs’ Biden?

There are contributing factors, his flacking for China as his son reaped ten-figure backing from the Communists, and his sexual harassment issues most prominently (for now). But the wiser and wilier among the DNC’s power elite know that they will not be able to hide Biden’s mental infirmity all the way to November third.  So, they are considering how and when best to be rid of Joe.

Thomas Lifson  "If we presume that Joe Biden’s pace of mental decline doe not reverse direction, the Democrats will be stuck with an embarrassment leading them into disaster in November.  Unless there is vote fraud on a massive scale, Americans will not hand the fate of the Republic to Grandpa Simpson, also known as “Plugs” Biden after undergoing expensive hair transplant surgery in 2008 to avoid going bald." . . .
. . . "Should this path be followed, Sanders supporters are on the record that they will burn down Milwaukee if the Bolshevik is not fairly treated. But the entire reason Biden garnered the support he did was that he was supposedly “safe” compared to an open socialist. They fear a Sanders-led ticket would bring total disaster." . . . 

. . . Such a switch could be made any time between the convention nomination and Election Day. Because we technically vote for Electoral College members rather than presidential candidates, it may be, as Vox proposes, that Electors could simply transfer their vote from the old Democratic nominee to the new one regardless of what was printed on the ballot. But the legal situation is uncertain and varies from state to state. "For instance," notes FiveThirtyEight, "Michigan's law requires an Elector to vote for the ticket named on the ballot whereas Florida's rules say that an Elector is to 'vote for the candidates of the party that he or she was nominated to represent.'" That means a sooner swap, allowing more states to print the new name on the ballot, would be better. Yet court battles would be inevitable with the ever-litigious Trump involved.

"At this point, outsiders have no way of knowing the real extent of Biden’s infirmity, nor do we know the true views of the party insiders and their funders about his prospects for avoiding embarrassment and defeat. But if I were a betting man, I’d wager that someone else will be on top of the ticket November third."

Botox, hair plugs, and veneers: Biden could escape the cosmetic surgery scrutiny Hillary Clinton endured
"Cosmetic doctors are certain that former Vice President Joe Biden’s full head of hair, smooth forehead, and Cheshire Cat grin are the result of plastic surgery and other procedures."
. . . "Dr. Jeffrey Spiegel, chief of the Division of Facial Plastic and Reconstructive Surgery at Boston University Medical Center, said in 2013 that John Kerry, the 2004 Democratic nominee, had been "a little over-injected" with Botox and "looks Frankenstein-ian."

"The key to effective cosmetic surgery is subtlety, Alster said. “If they look like they’ve had cosmetic work, it works against them.' ". . . Joe's teeth had their own web site:  Joebidensteeth.com

Are these signs of mental infirmity in Biden back in 2012?

Daily Beast  "So just how many times did Joe Biden deploy his withering/excessive smile of contempt in Thursday night's debate? We've counted them up -- non-teeth-baring smirks excluded -- and present them here."