From Reveille Research comes a “no surprise” result in the race for the Republican nomination for Governor:

Head-to-head match-ups show no difference.
The conclusion:
“Illinois is deeply dissatisfied with the direction of the state, and Darren Bailey is the only Republican candidate positioned to capitalize on this frustration. He dominates the primary ballot test and commands clear leads in one-on-one matchups with both Jim Mendrick and Ted Dabrowski. While a majority of voters still undecided in the primary, Bailey is uniquely placed to consolidate support and secure the nomination.”
Since there was no match-up with Governor JB Pritzker, I don’t see how the pollster can conclude that Bailey is “positioned to capitalize on…frustration” with Pritzker.
I have no doubt that such a head-to-head question would have Pritzker winning.