Scrutiny of President Joe Biden’s ability to serve a second term should he be victorious in November — or even secure the Democratic Party’s nomination — has increased tenfold after his presidential debate performance on June 27 opposite the presumptive GOP nominee, former President Donald Trump. To conservative audiences, the 81-year-old president seemed his normal senile self, but left-wing media pundits and Democrats looked on in apparent shock at his inability to form a coherent sentence. Since then, evidence of what the Biden administration does to keep him afloat has emerged from the f…