I'm flying ORD-CVG-ORD-PDX next week to make a pitstop for a meeting in Cincinnati before I head home.

If I check a bag in ORD, can it be checked through to PDX so that I don't need to figure out what to do with it in CVG for 7 hours? It seems like that ought to be okay, but I've never taken a back-tracking route like this before.