WaPo posts smear of La Raza without rebuttal

From a Washington Post online discussion with reporter Ed O'Keefe:

Dunn Loring, Va.: Although The Post has had several stories about Sotomayor quoting her friends and even had a chat with the head of an organization of which she was a board member, when can we expect a story about her involvement with La Raza, which supports the return of the western US to Mexico?

Ed O'Keefe: There'll be plenty of time between now and confirmation.

The National Council of La Raza does not support any such thing.