There are several good replacements for Senator Grassley, I am sure. And every one of them is a Republican.
Iowa is not so “purple” as to make the likelihood of replacement of Senator Grassley with a Democrat (the gang that can’t count straight) a very strong one. But whoever is going to go to bat will have to be getting into the practice box pretty quickly.
Fair enough.
Will just note that if Congress ‘Rats go down (Pelousy/Shoomer), Grassley is essentially 3rd in line of POTUS succession, with a non-NBC 2nd.