There has been an enormous amount of hand-wringing over a recent ABC news poll that showed Joe Biden losing to Trump if the election were held today. The keening, the crying, the rending of garments from otherwise reasonable people was astonishing considering that it was just one poll, we are a long way from the election and most of them are old enough to remember when Barack Obama was toast in 2011 when his numbers were underwater. And yes, back then there was a ton of nervous chatter about replacing him on the ballot with someone else, putting up a serious primary and all the rest. So this is something Democrats do and it’s one their most annoying traits. Anyway, here’s some news for you to chew on: As Democrats coalesce around him as their inevitable nominee, President Biden still narrowly leads former President Donald Trump in a 2024 general-election matchup, according to a new Yahoo News/YouGov poll. Yet the results also expose significant vulnerabilities for Biden — including his advanced age and the widespread perception that his running mate, Vice President Kamala Harris, would not be “ready to assume the presidency” if necessary. The survey of 1,584 U.S. adults, which was conducted from May 5 to 8, shortly after Biden announced his reelection bid, comes on the heels of a Washington Post/ABC News poll that showed him trailing Trump by 6 percentage points and suffering the lowest approval rating of his presidency — much to the consternation of Democrats from the White House on…