Marjorie Taylor Greene, the firebrand Republican congresswoman, told a British television journalist to "go back to your country" after being challenged over American gun laws.
The Georgia representative was incensed by questions posed by Siobhan Kennedy, of Channel 4, during a press conference held by the Second Amendment caucus, a group of Republicans hostile to the imposition of gun restrictions.
With emotions still running high after last month's school shooting in Uvalde, Texas, which claimed the lives of 19 children and two adults, Kennedy challenged America's lax gun laws.
"We don't have guns in the UK, that is true, but we don't have mass shootings either. And our children aren't scared to go to school," she said.
Incensed, Taylor Greene snapped back: "You have mass stabbings, lady. You have all kinds of murder and you've got laws against that."