One of the political norms of the Northwest is this: Indian tribes vote Democratic. It's broadly the case, and in some places it sticks out. Jefferson County, Oregon, and Bingham County, Idaho, to cite two examples, are two strongly Republican counties; in each case, the one precinct that tends to go Democratic is the one holding most of the population of an Indian reservation (Warm Springs and Fort Hall reservations, respectively).
Which is what makes interesting the report today that the nine Indian tribes of Oregon (those groups, often including many bands each, recognized by the federal government) all have endorsed Republican Gordon Smith for re-election to the U.S. Senate.
The numbers involved are not especially large; only about 1.4% of Oregonians are Native American. But Smith can take some useful symbolism from it.