Tuesday marks a milestone for Gov. Bruce Rauner: his first 100 days as Illinois' governor. It's the first time the private equity investor has held elected office. He came in with big ideas, and big challenges.
There's no official significance behind a governor's first 100 days, but it's often used as the yard stick to gauge how well a new politician is doing.
Historians seem to trace it back to Franklin Roosevelt craftily using his first 100 days as president to usher in his New Deal. FDR was trying to bring the United States out of the Great Depression.