While there is no evidence hackers intercepted or tampered with the results, a security firm consulted by ProPublica found that the app lacks key safeguards.

Most primaries are run by state and local governments. But caucuses are different — and Iowa shows how that can be a problem.

ProPublica is relaunching its collaborative project for a third time to cover voting during this crucial election year. We’re recruiting newsroom partners.

An analysis from three advocacy groups has found that New York City’s plan for early voting for the 2020 national elections is grossly inadequate and, as designed, will favor white, affluent voters.

In 2018, Facebook and Twitter decided to play a role in helping people register to vote in what promised to be a momentous midterm election. To do so, the social media platforms directed users almost exclusively to a website called TurboVote, run by a nonprofit organization known as Democracy Works. TurboVote was launched in 2012, and it promised to streamline voter registration and remind people to cast ballots on Election Day.

Evidently, things did not go seamlessly.

Since we launched our Facebook Political Ad Collector project in fall 2017, more than 16,000 people have participated in it. They all agreed to install a browser plug-in that anonymously sent us the ads they see when they browse Facebook. We used that data to understand and report on how political messaging on Facebook works, and how the system is being gamed to manipulate the public discourse.

Election Day in America brought its familiar mix of misery and allegations of mischief: Aging voting machines crashed; rain-soaked citizens stood in endless lines; laws that many regarded as attempts to suppress turnout among people of color led to both confusion at the polls and angry calls for recounts and investigations.

If the defining risk of Election Day 2016 was a foreign meddling, 2018’s seems to have been a domestic overload. High turnout across the country threw existing problems — aging machines, poorly trained poll workers and a hot political landscape — into sharp relief.

Voters in Missouri faced confused poll workers as they went to vote on Tuesday, with many reporting they were turned away for not having valid photo identification. The confusion was a result of an October court ruling that allowed Missourians to cast ballots with a range of forms of identification.

The post-mortem on what went wrong at polling places across New York City on Election Day won’t be done for days, if not weeks. Across the city — from Brooklyn to Manhattan to the Bronx — ballot scanners jammed and malfunctioned, sowing chaos at polling places.

But preliminarily, it looks like one of those rare occasions where election officials can plausibly blame the weather, at least in part.

Melanie Taylor arrived at her polling place in a Charleston, South Carolina, church at 7:30 a.m., only to find more than 100 people in line ahead of her. Some of them had already been waiting since 6:15. The voting site was using a computerized login for the first time, and the system was down.