EXHIBIT 23(a) CONSENT TO KPMG PEAT MARWICK LLP [LOGO OF PEAT MARWICK LLP APPEARS HERE] The Board of Directors Liberty Bancorp. Inc.: We consent to the use of our report incorporated herein by reference and to the reference to our firm under the heading "Experts" in the prospectus. /s/ KPMG Peat Marwick LLP Chicago, Illinois October 15, 1996