PORTLAND, Ore. (AP) — Appealing to voters’ anxieties about the soaring cost of living is central to Democrats’ messaging in their hopes of big wins in this year’s midterm elections. In Oregon, a question on the primary ballot is complicating that strategy. The Democratic-controlled Legislature raised the state gas tax and a range of fees last fall as a way to pay for road improvements and plug a hole in the state’s transportation budget. Republicans responded with a petition to repeal the