Romney will speak at the Products Pavilion at State Fair Park in West Allis, Wis.
In Ohio, Romney will attend a campaign event at Screen Machine Industries in Etna.
In the evening, Romney and his wife, Ann, will join vice presidential candidate Paul Ryan and his wife, Janna, for a rally to kick off the Romney-Ryan Real Recovery Road Rally in West Chester, Ohio.
Joining Romney and Ryan will be nearly 100 governors, senators, mayors and other officials. The rally includes a performance by musician Kid Rock.