Gov. Bruce Rauner is planning to run statewide ads dubbing Republican primary rival State Rep. Jeanne Ives "Madigan's Favorite Republican."

Rauner had largely avoided speaking about his GOP rival or appearing in the same room with her -- except for one joint appearance at the Chicago Tribune.

But a controversial new ad that Ives is running statewide targeting the governor -- and a $2 million infusion of cash into her campaign from conservative donor and Lake Forest business magnate Richard Uihlein -- perhaps changed the governor's tune.

Linking her to Rauner's arch-nemesis Democratic House Speaker Mike Madigan is essentially the governor's equivalent of going nuclear.