James Chandler, MD, renowned neurosurgeon and co-director of Northwestern Brain Tumor Institute in Chicago is available for media interviews anytime today on Senator McCain's surgery. Dr. Chandler has performed more than 4,000 brain operations in his career and has extensive knowledge on removing blood clots in the left frontal lobe of the brain (which according to Mayo Clinic Hospital in Phoenix was performed on Sen. McCain). Dr. Chandler can discuss what this condition is, how significant it is, what could be the potential causes, what the surgery involves and what does the recovery process look like for a patient undergoing this type of surgery.