The 2019 off-year turnout of 1.57 million voters beat the last high of 1.4 million in 2013. Voter participation in off-year elections is driven by contested ballot issues, high expenditures for advertising and GOTV efforts. In 2013, Amendment 66, the $1 billion income tax increase for education, spent $11 million, mostly by the proponents. It lost by 2-to-1. In 2015, there were non-controversial issues (marijuana tax) on the ballot and no statewide issues. This year, Proposition CC lost by 7 percent and total expenditure will be at the $7 to $8 million level.
When all the voters were counted, the reported partisanship was Democrat 32 percent of the vote, unaffiliated 32 percent and Republican on top with 38 percent. On the Friday before the election, 700,000 votes were recorded, and Republicans were 34 percent of the vote. Many Democratic and unaffiliated voters came in late. The unaffiliated tend to be younger and more liberal-leaning.