They would be abandoning some incredible watersheds[1] if they did. That's probably the point of this whole project, to put a huge chunk of western water resources under the control of a single state amenable to white supremacists[2].
I mean, not wrong, but Oregon was founded as an explicit white ethnostate. The state constitution language barring "negroes, mulattos and Chinamen" was not even removed until 2002.