My congressional reps are purely partisan political hacks, so who do I write?

Haha, funny, I actually wrote both my senators about the same thing and they replied with a similar answer, though not as direct. If you didn't write all three of your congressmen, then write the other one. If they are gonna answer you like that then send the letters to local papers in your area. Let everyone know what partisan and ignorant people they have representing them and get those guys out of office.