Keep your message short and polite: 

Dear Rep._____, My name is Jane Doe and I am a Catholic constituent in your district. I am a recent arrival/have lived in your district for 40 years and wanted to take this opportunity to introduce myself and thank you for serving in the Washington state legislature.  I know you address numerous issues of importance each legislative session and want to share a few of my top areas of concern for our state/district.  

Pick one or two issues you are most interested in and share why:  

I am particularly concerned about homelessness in our rural communities. As a resident of Yakima, I see how the lack of access to housing and services continues to exacerbate these issues, especially for the elderly and kids exiting foster care.

End with an invitation for further communication:

Thank you again for your efforts on behalf of Washingtonians. I look forward to further conversations with you regarding legislative proposals that could improve the dignity and sanctity of life for all residents of our state.