Why are they waiting til Monday for the surgery?
It's possible that they need to stabilize him prior to surgery. When I was hospitalized due to post-operative complications (pneumonia and pleurisy), the doctors had to wait 7 days for my condition to improve enough so I had a chance to survive the surgery.
Considering Clinton's initial diagnosis, it's likely that his carotid arteries are obstructed and are probably going to get chemically cleared with drugs before they go into surgery.
One report I heard was that they probably had him on a powerful blood thinner (Plavix) and it takes a few days to wear off.
New news cycle.
Earliest opening??