Sen. John Kerry (D-MA) will undergo elective surgery on his right shoulder tomorrow that will prevent him from working rope lines for a couple weeks and from holding up kissable babies for even longer.Kerry will wear a sling for a day or two after a 45 minute outpatient surgery at Massachusetts General Hospital to repair a torn rotator cuff, said his surgeon, Dr. Bertram Zarins. Kerry tore the tendon in January in the Iowa Primary tyring to brace himself when his campaign bus lurched suddenly. Zarins said that Kerry 'still cannot use the shoulder without pain.'Kerry, who underwent successful prostate...