Now, as much as I am inclined to think of the GOP as ignorant fools, there are a lot easier ways for them to imply anti-black racism than by using "Chicago style politics", a phrase which has for DECADES implied a degree of lace curtain corruption and machinery that harkens back to the days of Tammany Hall. It clearly implies a degree of corruption, not some racial code bullsh*t they could pull out of their asses using a multitude of other sayings.
The implications of "Chicago governance" has been around a lot longer than Obama has been president. And while yes, Republicans do misuse the term for anything Democrats do now days, assuming it's a racist code phrase for "blacks" is ridiculous. Even if used by Republicans.
You are correct, but don't expect the race baiters to understand.