I am not a doctor so I have been reluctant to say he is having problems in that area. However, His town hall last summer and Dingell out and out lying to a Dad of a special needs kid and getting flustered had me wondering...
Shortly thereafter his wife resigned from GM. Why? To help run the ship if he is having difficulties?
But look who is running against Dingell:
https://robsteeleforcongress.com/about-rob.html
A Cardiac Surgeon, Wow.....