Dear Senator Flake,
I've had a soft spot for you personally since I saw you at the taping of Wait Wait Don't Tell Me. I recently read your profile in The Atlantic, and I want to emphasize that my strident opposition to you is not based on you as a person, but your votes on policy. Just two examples:
1. The Affordable Care Act literally saved my life. Your votes would have left my wife a widow and our child without a father. There is simply no way around the bottom-line fact that your vote would lead to the deaths of people like me.
2. Your votes have supported those who attack and vilify members of the LGBTQ community. Your votes help build a situation where millions of people aren't considered full citizens, and are subject to discrimination and even violence.
You may well be the good person portrayed in The Atlantic. But your votes lead to horrible outcomes for real people.
Thank you for your time.