| 2020 | 2020 | 2020 | 2018 | 2018 | 2018 | 2018 | 2018 | 2016 | 2016 | 2016 | 2014 | 2014 | 2014 | 2014 | 2014 | 2014 | 2012 | 2010 | 2010 | 2010 | 2010 | 2010 | 2010 | 2008 | 2008 | 2006 | 2006 | 2006 | 2006 | 2006 | 2004 | 2004 | 2002 | 2002 | 2002 | 2002 | 2002 | 2002 | 2000 | 1998 | 1998 | 1996 | 1994 | 1990 |
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| Exp Collars | Fair Tax No | Trump | Curran | Rauner | Harold | Helland | Senger | Dodge | Trump | Kirk | Munger | Oberweis | Rauner | Schimpf | Webster | Topinka | Cross | Romney | Kirk | Brady | Kim | Enriquez | Topinka | Rutherford | McCain | Sauerberg | Topinka | Umholtz | Rutherford | Pankau | Radogno | Bush | Keyes | Durkin | Ryan | Birkett | Cohn | Ramsdell | Topinka | Bush | Fitzgerald | Ryan | Salvi | Edgar | Edgar |
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| Cook County | 37.11% | 24.05% | 21.79% | 24.26% | 25.72% | 15.44% | 20.29% | 22.51% | 21.00% | 24.87% | 29.05% | 25.90% | 33.26% | 21.44% | 17.55% | 35.45% | 31.34% | 24.64% | 31.63% | 28.61% | 18.51% | 15.96% | 39.83% | 33.60% | 22.82% | 17.04% | 26.37% | 12.50% | 19.58% | 17.25% | 27.37% | 29.15% | 16.42% | 27.32% | 31.77% | 34.35% | 20.74% | 19.37% | 42.69% | 28.65% | 34.74% | 44.27% | 29.14% | 52.04% | 45.17% |
| ___Chicago | 28.61% | 15.83% | 13.43% | 15.19% | 16.96% | 9.33% | 12.09% | 13.87% | 12.41% | 16.35% | 19.10% | 15.36% | 20.63% | 12.70% | 10.51% | 25.06% | 19.37% | 14.59% | 19.47% | 17.41% | 10.87% | 9.90% | 27.19% | 20.63% | 13.69% | 9.85% | 15.30% | 6.82% | 11.16% | 8.68% | 15.65% | 18.21% | 10.10% | 16.10% | 18.82% | 21.61% | 11.49% | 10.05% | 28.26% | 17.13% | 20.52% | 30.24% | 17.74% | 36.43% | 32.87% |
| ___Cook Suburbs | 45.05% | 32.04% | 29.96% | 33.56% | 34.73% | 21.72% | 28.68% | 31.35% | 29.83% | 33.53% | 39.11% | 35.89% | 45.32% | 29.76% | 24.27% | 45.26% | 42.66% | 34.89% | 43.47% | 39.50% | 25.93% | 21.86% | 52.04% | 46.11% | 32.31% | 24.34% | 37.42% | 18.08% | 27.93% | 25.60% | 38.74% | 40.43% | 23.01% | 38.61% | 45.00% | 47.32% | 30.20% | 28.82% | 57.18% | 40.85% | 50.07% | 57.83% | 42.34% | 67.26% | 58.48% |
| Collars | 58.79% | 43.43% | 43.17% | 46.13% | 47.84% | 33.29% | 42.96% | 45.93% | 42.81% | 45.78% | 51.70% | 50.56% | 59.58% | 44.31% | 37.00% | 55.44% | 57.29% | 48.34% | 56.36% | 52.93% | 37.89% | 31.21% | 60.55% | 59.60% | 43.36% | 35.62% | 46.01% | 29.09% | 38.85% | 41.75% | 49.52% | 54.02% | 31.40% | 48.68% | 57.08% | 60.72% | 39.08% | 43.83% | 67.27% | 53.08% | 60.58% | 65.60% | 51.02% | 75.35% | 61.16% |
| Downstate | 67.31% | 58.00% | 55.57% | 49.70% | 58.69% | 42.13% | 51.75% | 52.21% | 56.63% | 52.33% | 56.27% | 54.26% | 60.91% | 49.95% | 41.65% | 59.88% | 57.46% | 52.84% | 59.26% | 59.18% | 40.98% | 35.75% | 60.12% | 59.11% | 47.52% | 35.67% | 47.77% | 33.00% | 42.75% | 38.83% | 49.73% | 54.38% | 35.81% | 41.78% | 50.91% | 51.23% | 33.19% | 38.92% | 58.81% | 50.56% | 61.04% | 48.82% | 46.64% | 69.23% | 50.99% |
| TOTAL | 53.27% | 40.55% | 38.87% | 38.83% | 42.74% | 29.23% | 37.00% | 38.91% | 38.76% | 39.78% | 44.43% | 42.69% | 50.27% | 37.77% | 31.39% | 49.56% | 47.79% | 40.73% | 48.01% | 45.94% | 31.65% | 27.02% | 52.62% | 49.68% | 36.78% | 28.53% | 39.25% | 24.25% | 33.03% | 31.49% | 41.24% | 44.48% | 27.05% | 38.02% | 45.07% | 47.10% | 29.87% | 32.58% | 54.77% | 42.58% | 50.35% | 51.03% | 40.67% | 63.87% | 50.75% |
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