Three former Obama administration aides spoke at length about President Joe Biden’s age and whether Americans ultimately view him as too “frail” to serve another term in the White House. The trio concluded Biden’s age is a valid issue just seven months before this fall’s election and expressed concerns former President Donald Trump could win a second term. Jon Favreau, the chief speechwriter for former President Barack Obama; former Obama speechwriter Jon Lovett; and Tommy Vietor spoke about Biden’s age at great length during the Feb. 14 episode of their “Pod Save America” podcast. When discus…