Would you ever grant clemency to someone on death row?

[Joe Republic]

As has been mentioned, I would grant clemency if the guilt had since been called into question.

I oppose the death penalty, but I would continue to use the system as it was legally designed until I could remove it by legal means.  Universal clemency would be an abuse of my power.

[Joe Republic]

Obviously those against the death penalty will always vote to grant clemency.

Not necessarily.  See my post just a couple up from yours.