Dear Candidate,
As one of your supporters, I want to draw your attention to an issue that will be on my mind when I go to vote in the primary: the challenges and obstacles facing orphans and vulnerable children throughout the developing world. These children are at risk of disease, exploitation, and death. Many have no opportunity to go to school, or struggle to find enough food eat, or clean water to drink. The United States needs to stand up on these kids' behalf, deliver on funding promises, and encourage other countries to follow suit.
I urge you to work with Global Action for Children and other groups dedicated to improving the lives of orphans and vulnerable children worldwide. Every child deserves a chance, especially those whose parents cannot speak up for them. I hope you will be the one to give them that voice, and that chance.
Sincerely,
Your Name
City, State