Age is an important factor in any job hiring. Would you hire an 80-year old man to do a job over a 40-year old, if the 80-year old could do it a little better?
If it was a 4- or 8-year contract, who knows... that's a long time. President is probably the most stressful job on earth- even with the best medicine and food int he world, they still age terribly-- every one of them does. No doubt McCain will look very aged very quickly at the job.
There is an age minimum- they believe a 30-year old is TOO YOUNG for the job. Maybe there should be an age limit too.