A Republican running for Congress in Arizona snapped a photo of a passing school bus full of children on Tuesday near a housing facility for undocumented minors. He posted the picture to Twitter with a stern warning to his followers: "Bus coming in. This is not compassion. This is the abrogation of the rule of law."

Adam Kwasman later spoke with a local reporter and described seeing "the fear" in the children's faces, urging authorities to abide by the law and enforce the border against the influx of child immigrants crossing into the United States.

But there was a problem with Kwasman's story. The school bus was carrying local children on the way to a YMCA camp not far from the migrant shelter. A reporter at the scene said he saw the children laughing and taking pictures with their iPhones.

In an awkward interview caught on camera, Kwasman offered what could possibly be the fastest political walk-back in history.

"Do you know that was a bus with YMCA kids?" 12 News reporter Will Pitts asked.

"They were sad, too," Kwasman responded. "OK I apologize. I didn't know. I was leaving when I saw them. People are not happy down the line. That was an error by me."

"Those were not migrant children. That's fine," he added. "It was a mistake. That was a mistake. That was not correct and that's a mistake."