Reacting to tech troubles in Iowa, Nevada Democrats have scrapped plans to use similar technology at their caucuses in less than three weeks.
The party says it will not use an app developed by the same company that created the reporting app for Iowa Democrats that has been central to that state's delayed results.
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Other early voting states also tried to reassure the public on Tuesday that they could pull off smooth elections.
Officials in South Carolina and New Hampshire expressed confidence in their primary election systems.