Senator John McCain has brain cancer. McCain, 80, is a Republican who lost the 2008 presidential election to Democrat Barack Obama. He is considered a war hero from his service in the Vietnam War. His office and the Mayo Clinic Hospital in Phoenix, Arizona, provided the medical information about McCain on Wednesday night. McCain was diagnosed with glioblastoma, an aggressive form of cancer. It forms tumors in the brain and spinal cord, according to the American Brain Tumor Association. The American Cancer Society estimates that people who develop glioblastoma after the age of 55 have a five-year survival rate of 4 percent. McCain’s Senate office said the senator is in “good spirits” as he continues to recover from surgery at his Arizona home. Praise for McCain came from leaders of both political parties.