Check out left-bubble social media and it’s not just a sense of relief that President Joe Biden isn’t running for a second term. Instead, you’d think Vice President Kamala Harris — his apparent heir apparent as Democratic nominee — has all but won the election. Now, granted, partisans are gonna partisan. That’s a given. However, you’d think that Harris — who, let me remind you, before the June 27 debate that began unwinding Biden’s presidency was considered the biggest anchor on his chances of winning another term because he was old enough that he might die in office and she might become th…