Former Senate Republican leader and 1996 GOP presidential candidate Bob Dole has been hospitalized, Senate Majority Leader Harry Reid said on Tuesday. “He is at Walter Reed not for a checkup,” Reid said. “He is there because he is infirm. He is sick.” But an aide to Dole said he was undergoing a “routine procedure.” Dole, 90, has been hospitalized a number of times of the past couple of years. He was seriously wounded in Italy in World War II and then spent more than three years in the hospital.