I write my Representative all the time and let him know that he’s earning my vote based on his legislative actions. he’s a good guy that well represents his constituents and I think most of the correspondence that he gets from his constituents reflect that. If that correspondence were to suddenly turn sour over one issue right before an election, I suspect that he would become quite responsive.
Sounds like a good Rep.
I live in MA. For many of our Reps, it’s hopeless. Depends on which county you’re in, and who you’ve got.