SEATTLE -

In the airport city of SeaTac, a campaign backed by labor unions seeks to raise the minimum wage to $15 for many workers. In Whatcom County, an unprecedented amount of outside money is influencing an election that may shape whether the area becomes home to the largest coal shipping terminal on the West Coast.

Statewide, voters will decide whether to put labels on genetically modified foods in a campaign that has drawn hefty donations from food industry businesses such as PepsiCo, Monsanto and General Mills.

There's also a Seattle mayoral race and a legislative contest that could shape the balance of power in the state Senate.

Secretary of State Kim Wyman is forecasting a fairly average off-year voter turnout of 51 percent.