Initiative Measure No. 1366 concerns state taxes and fees. This measure would decrease the sales tax rate unless the legislature refers to voters a constitutional amendment requiring two-thirds legislative approval or voter approval to raise taxes, and legislative approval for fee increases.
Source for Popular Vote data: Washington Secretary of State. 2015 General Election Results, Washington Secretary of State (http://results.vote.wa.gov/results/current/State-Measures-Initiative-Measure-No-1366-concerns-state-taxes-and-fees.html) (accessed 06 Nov 2015)