As Philadelphia Mayor Jim Kenney was speaking about the history of the city and its Irish roots, CNN host John King was caught on a hot mic effectively mocking “Black Lives Matter.”

“In 1844, an early version of the Know Nothing political party held a rally here to protest the threat that Irish Catholic immigrants posed to the American way of life,” Kenney said.

“They claim these immigrants, like my family…” Kenney said as someone from CNN could be heard speaking, obviously not realizing their microphone was on.

“…were more likely to commit crimes than native born citizens,” the mayor continued.

“That’s the Irish Lives Matter movement,” CNN host John King could be heard saying and laughing.