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It’s Election Day for the 2016 Missouri primary

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ST. LOUIS COUNTY, MO (KTVI)- It's Election Day for the 2016 Missouri primary. Voters will choose the party candidates who will face off in the November general election. The polls open at 6 a.m. and will stay open until 7 p.m.

Officials are expecting a 31 percent turnout.

The most hotly contested race is for the republican nomination for governor. The four candidates are businessman John Brunner, former Navy Seal Eric Greitens, former U.S. Attorney and Missouri House Speaker Catherine Hanaway and current Lieutenant Governor Peter Kinder.

The latest polls show the race is too close to call with 19 percent still undecided. There are also key races for other statewide positions, plus U.S. Senate, Congress, and St. Louis Circuit Attorney.

St. Louis County election officials believed they've fixed the problems that led to a shortage of ballots in April. This time, they're also testing out some new technology to speed up the process at the polls. They will be using iPads to sign in voters at 50 of the county's 432 polling places.

Voters will sign in on the iPad then the system will print out a slip telling the election official which ballot is needed, based on the individual's registered address. It's supposed to be faster and more accurate. They hope to have it in all polling places this November.

For more information visit: What you should know about the August 2 primary