Dear Ambassador Oren,

I am writing to reiterate an invitation to you to address the first National Conference of the new pro-Israel lobby, J Street taking place later this month.

In just two weeks, over 1,000 people - most of them American Jews - will gather in Washington to give voice to a burgeoning movement that loves Israel, cares about its future, and believes only peaceful and immediate resolution of the Israeli-Palestinian conflict can secure Israel's future as the democratic home of the Jewish people.

Attendees at the conference will represent over 20 organizations. Many share a common bond in liberal and progressive political activism in other aspects of our lives. They range in age from 250 college students to others whose support for Israel predates the...