Republican Senator Mark Kirk is recovering at an Illinois hospital after undergoing surgery this morning for stomach pains. ABC News reports Senator Kirk's office says the junior Senator from Illinois was admitted to a hospital in Illinois Saturday morning after complaining of stomach pains. Doctors determined Kirk had gall stones, and needed to have his gall bladder removed. He underwent successful surgery this morning. His doctor expects a quick recovery. In 2012 Kirk suffered from a stroke. He returned to the Senate a year later.