The primary was open to both registered Democrats and unaffiliated voters.
The percentage of unaffiliated voters has risen by 12 percent.
Much of the outcome depends on the 800,000 unaffiliated voters.
There are about 660,000 Democrats and 550,000 unaffiliated voters in the state.
As the Republicans have lost their edge, the number of voters unaffiliated with any party has grown.
However, unaffiliated voters may declare their party affiliation up to and including the day of the primary election.
He is an unaffiliated voter who rarely missed a local or state election.
Republican leaders said they were not sure what effect the unaffiliated voters would have on the outcome.
Among unaffiliated voters, he led 39 to 36 percent but had lost nine points of his support in the past month.
Q. Can unaffiliated voters join a political party and vote?