3H45Min is not enough for transit on EL both ways and quality time spent in the loop, considering all the possible delay opportunities.

I'd say cab it (wed at noon, traffic shouldn't be too bad) from ORD to loop, spend and plan your steps of action when you are in the loop, and possibly catch the EL back to ORD and plan on spend 50min (which would be much more predictable than cab if you are going to leave loop 330-400PM and to ORD) on it.

Still a rush though every steps of the way......catching an earlier standby from MSP to ORD would be recommended.