My opinion...No, don't leave it blank, be honest the people at your current job will respect you for your honesty and the person reviewing your resume will be impressed.
People at his current job will look into finding a replacement for him.
Same reason why you don't accept a better counter offer from your current job, you'll be branded as unloyal and they'll look to replace you at a time that's convenient to them while you have nothing to fall back on.
My opinion...No, don't leave it blank, be honest the people at your current job will respect you for your honesty and the person reviewing your resume will be impressed.
People at his current job will look into finding a replacement for him.
Same reason why you don't accept a better counter offer from your current job, you'll be branded as unloyal and they'll look to replace you at a time that's convenient to them while you have nothing to fall back on.