The new Illinois State Bar Association president has always had an affinity for the statewide bar group, according to a source close to him.“If there was a condition such as ISBA-itis, he would have it,” said Michael R. Hartigan, son of the ISBA’s new president, former Cook County circuit judge Russell W. Hartigan, at a ceremony Friday. “He has ISBA FOMO for all of you who know that,” referring to the shorthand term for fear of missing out.Russell W. Hartigan, of Western Springs, was sworn in …