Not me, but Tom Roeser says it in the Sun-Times.
One problem with the column–there is no law allowing the Senate Nominee to be replaced–the assumption is that the Courts would allow the Central Committee to replace Jack!, but that is far from certain if he were to drop out.
McKenna a team player? wasn’t he the last republican primary loser to endorse Jack!, waiting some uncomfortably long period of time? wasn’t he the only one willing to challenge Fitzgerald in the primary had he run? (Primary election highlight this year–handing Roeser an Obama palmcard at our local polling place)