Amtrak 58 leads a very 2 hour late Amtrak 353 down the Shoreline sub to Chicago. Due to equimentment issues it was delayed close to 2 hours at Pontiac before departing.
Amtrak has three routes that connect Michigan with Chicago, but none to the East or South. The routes are: Wolverine - Pontiac - Chicago; Blue Water - Port Huron - Chicago, and Pere Marquette - Grand Rapids - Chicago.