There’s also the question of whether Congress and Oregon would want to support the change, both of which, in addition to the consent of Idaho’s legislature, are required under Article IV Sec. 3 of the US Constitution before a new state can be formed of the existing state of Idaho and parts of the existing state of Oregon.
Sure, because by incorporating more economically underperforming areaa and dropping its per capita GDP, its federal funding share under many state-federal programs woild go up, increasing the degree to which if is subsidized by the rest of the country, including the reduced Oregon, which would get lesser proportion of federal funding for the same programs by shedding underperforming regions.
In an interview with Fox News, Idaho Gov. Brad Little said he understands why some rural Oregonians want to redraw the borders.
"They’re looking at Idaho fondly because of our regulatory atmosphere, our values, Little told Fox News. What they’re interested in is they would like to have a little more autonomy, a little more control, a little more freedom and I can understand that."
Also, Boise is farther from these counties than Salem, so it's not especially clear that representation would be significantly better.