Why type of illness did he have?
Apparently the fatal kind
Personal life
Colmes was married to Dr. Jocelyn Elise Crowley, a professor of public policy at Rutgers University, whose sister is Monica Crowley, the conservative radio commentator, pundit and television personality.[17]
Colmes died on February 23, 2017 at the age of 66 after suffering a “brief illness,” which Stuart Varney disclosed to be cancer.
Source: Wikipedia
On radio news this morning I heard cancer.
Lymphoma, not sure what type of lymphoma tho.