Answer is the liberal-rich combo. Even moderate voters apparently found it difficult to relate to somebody with a billion dollars.
These days, critics point out that Biden, now 80, would be the oldest president ever running for re-election — and therefore his veep should get special scrutiny. Eight vice presidents have succeeded to the presidency when their boss passed away. Some of those were terrible assassination stories, which left the voters who hadn't really thought about the second slot doubly traumatized.
But four presidents simply … died. We will refrain from an extended discussion of Zachary Taylor, except to say that Biden should not, under any circumstances, consume cherries and cold milk on a very hot summer day. Or the saga of William Henry Harrison, who made the very major error of drinking White House water that came from a marsh near a field of human excrement. Warren Harding died of a heart attack at 57 — possibly because he had run out of other things to go wrong with his administration. And FDR ran for a fourth term even though a specialist had warned his physician that he'd never live through it.
Biden's medical team says he's in super shape, which certainly sounds plausible. He appears devoid of bad habits — works out all the time and his strongest drink is Gatorade. Although there are different estimates of his life expectancy, pretty much all of them would get him through a second term. One, by a team of medical experts before the 2020 election, projected 96.8 years.
(The same team estimated Donald Trump would make it to almost 89 — that could keep him in your lives for about a dozen more years, people. Just letting you know.)
No matter how well Biden is doing, you've got to take a serious look at anybody who's planning to be No. 2 to a guy in his mid-80s. With Harris, there's definitely a downside. She was, you'll remember, not a terrific candidate for president when she ran in 2020, and her staff was sort of a mess.