1) He continued to pay property taxes on his Chicago residence.
2) He continued to hold an Illinois driver's license.
3) He continued to list his Illinois address on his personal checks.
4) He continued to pay Illinois state income tax.
That this was a unanimous decision, which even the 3 Republican judges are in agreement with, speaks for itself. I am not an Obama fan, but attempting to leverage political points on this, knowing the nature of the Illinois Supreme Court decision, is dishonest. Of course, we are talking about "politics" here, which is pretty much interchangeable with the word "dishonest". LOL.
Supreme Court decision, in PDF format, is here.
Political makeup of Illinois Supreme Court is documented here (4 Democrats and 3 Republicans)
Of course, Rush Limbaugh is going to have a field day with this, but since he is an idiot, it is understandable. LOL.