Looking at Kerry, I don't think he has enough energy to be president for 8 years.
You may be on to something there. I think Kerry himself only wants 4 years. I remember in a speech he made not too long ago....he said....."If you liked the 8 years that Clinton was President......you'll love 4 years of a Kerry Presidency!"
Why does he only say four? Why doesn't he leave it open a bit and say...."You'll just LOVE the Kerry Presidency." Which could be X amount of years. Maybe he only wants four years.....