I don’t know what to think about it.
As for Andy McKenna, he’s a largely unknown quantity to me.
Speaking of Senator Percy, check out this tidbit from McKenna's bio:
McKenna earned a bachelor degree in business administration from the University of Notre Dame in 1979. During his senior year, two events occurred that stimulated his interest in politics and the economy In the fall of 1978, Senator Chuck Percy was in a tough re-election campaign. Late in the campaign McKenna's parents hosted an event for Percy at their home. Eight United States Senators attended the event. This gave McKenna the chance to speak with each and, in particular, to spend time visiting with Senator John Heinz of Pennsylvania. Heinz was the first MBA ever elected to the United States Senate. At the time, McKenna was applying to both law and graduate business schools. Heinz told him, "If you want to go into politics, go to MBA school".
http://www.weareillinois.org/learn/chairman.aspx
I think USConservative is right, both McKenna and Kirk owe their political career to the combine. McKenna's political positions aren't nearly as liberal as Kirk (McKenna actually ran as one of the conservative candidates in 2004), and even McKenna denounced Kirk Dillard for appearing in Obama campaign ads, so McKenna would be a step up from Kirk. However, there's no way in hell I'd vote for McKenna in the primary since he was LaHood's hand-picked choice to "take out" Fitzgerald, and was quite willing at the time to run against him. I might hold my nose for McKenna over a RAT in November, it came down to that.