One of Barack Obama’s senior advisors is giving their take on President Joe Biden’s mental state. In an opinion piece, David Axelrod, who worked for the 44th commander-in-chief and was the head strategist for his 2008 and 2012 presidential campaigns, criticized the 81-year-old for failing to recognize how unfit he is to continue trying to win back the White House following his lackluster performance in his first debate against Donald Trump. “After the debate, the already robust number of Americans who deem the president too old to serve another term went up to 74%. Only 42% said the same about…