I actually know 80 year olds that seem far more alert and well spoken.
Besides, just becuse pople live longer, doesnt mean that government is the place for septegenerians. I would like to think that the president of the united states of Murca can actually handle a few late nights without risk of health issues.
im all for capping presidential age at 65. Biden (and Trump) is from a different era, he has no place determining the future.