ORD Connection
It is doable, with a couple of conditions being met:
1) Your PDX flight is on time or early into ORD
2) Your arrival gate is in the H/K terminal (I think International departures are all out of H/K. Arrivals at M terminal.
I've made connections this close before, and a lot will depend on how well things are going.
Are they giving you a single connection option or a double connect?
LH also serves PDX...might peek there as well.