[Salman]

I think the Sisters of the Poor probably wrote individual letters to each justice, don’t you?

That's how it appears to me. Individual letters, that is. Not just copies of the same letter.

[Salvation]

But then I read later in the thread that one justice is designated for one part of the country, and Sotomayor happened to be theirs.

I’m not that familiar with all of this works. But I would not be surprised if the Sisters wrote to all the justices.