Since nobody else has mentioned it, the fact is that in Oregon there was an extremely large percentage of votes for 3rd Party Candidates in 2016, especially Libertarian and Green.
Needless to say, many of these voters were Millennial Voters and HRC was not particularly popular among this Demographic that in the "Closed Primaries" went heavily Bernie Sanders, and Indy NPA voters in November '16 of this demographic didn't vote for either Trump nor Clinton....
Even in many of the Mill Towns of "downstate Oregon" where we observed some of the greatest swings between '12 and '16 with Presidential Voting patterns, there really wasn't so much as a net increase of the overall % of the 'Pub Pres vote, as there was a decrease in the 'Dem vote share towards third party candidates....
I wouldn't read too much into the 2016 Presidential Election swings in Oregon, although for sure there were some increased 'Pub 'Pres percentages in many small town and rural parts of the State....
Been awhile since I reviewed the numbers, but here's a refresher course for anyone who is interested....
https://uselectionatlas.org/FORUM/index.php?topic=252085.msg5386692#msg5386692