Simply replace the unfilled areas such as "" and "[date]" with your information.
Dear [Senator/ Representative] [Last Name],
My name is [first & last name]. As a concerned citizen, I am writing this letter to ask that you vote [in favor of/against] measure [bill name].
Due to my experience [experience relevant to bill], I have first hand knowledge of how this legislation can affect the lives of people in my community. While researching this issue, I found that over [realistic statistic] [people/communities] have also had a similar experience. That is over [statistic] families whose lives will be directly impacted by your decision in this matter.
I ask that you take action to protect all of your constituents by [supporting/rejecting] measure [bill name]. Please vote ["yes"/"no"] on [date of vote].