Gerrymandering – Its something Oregon apparently does very well
Oregon has been one-party Democratically controlled for nearly 35 years. Princeton University’s non-partisan Gerrymander Project report on Oregon basically explains why our last governor election in 2022 resulted in a Democratic governor winner that didn’t even get half the votes.

Brian Smith, a Democratic campaign consultant and member of the Muscogee Nation who works to elect Democratic candidates of color, agrees with Schrader.
“I joked with some colleagues the day after the election that Oregon Democrats can’t even get their gerrymandering right,” he said.
https://www.oregonlive.com/politics/2022/11/democrats-fall-short-republicans-advance-in-first-test-of-new-oregon-congressional-map.html