For logos, the writer made his claim, the author supports the congressman and praises him for making excellent decisions.
For ethos, the author have evidence and proof from scientist and researchers. One example of it was that a gun kept in the home is 43 times more likely to kill a member of the household, or friend, than an intruder. This is a fact. It was researched, and proven.
For pathos, the author brought up emotional expects. An example would be that the author lost his child via a gun. Such a sensitive topic like this was bringing brought up, what’s more it was also stressed at the end of the letter. This was the point that made this letter go up to the next level. Without knowing that the authors’ child was killed by a gun, I don’t think much people will take into consideration of what she is saying.