18 Exhibit 23(a) CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS The Board of Directors ALLIED Group, Inc.: We consent to the use of our reports incorporated herein by reference and to the reference to our firm under the heading "Experts" in the prospectus. /s/ KPMG Peat Marwick LLP KPMG Peat Marwick LLP Des Moines, Iowa December 19, 1996