View the letter. Check if your Representative has signed on. Then contact them to express your thanks or urge them to sign on.
This bi-partisan letter states that "American leadership is essential to achieving meaningful progress" on Israeli-Palestinian peace.
The 218th General Assembly of the PC(USA) adopted a resolution affirming that Presbyterians "Focus our energy on the United States government, demanding that it assume an intensive and unrelenting role as a peacemaker, bringing together the opposing parties in forums where reasonable people can reach reasonable compromises about highly complex issues."
Churches for Middle East Peace provides many of the resources for this effort.