Kamala Harris has been condemned by a Holocaust survivor for making comparisons between Donald Trump and Hitler.

Jerry Wartski, who was sent to the Auschwitz concentration camp as a child, called on the vice president to apologize in memory of his parents and others murdered by the Nazis.

Harris repeatedly called Trump a “fascist.” a CNN town hall event on Wednesday night, noting that others had compared him to Adolf Hitler.

It came after John Kelly, Trump’s longest-serving White House chief of staff, labeled his former boss a “fascist” and claimed that Trump had told him: “Hitler did some good things.” The former president has denied the allegations, labeling Kelly a “bully.”

Mr Wartski, who has previously met Mr Trump, said Mr Harris’ statement on Wednesday was “the worst thing I have ever heard in my 75 years in the United States”.

“I know more about Hitler than Kamala Harris will ever know in a thousand lives,” he said in a video posted on social media.

“She owes my parents and everyone else murdered by Hitler an apology for repeating this lie.”

Republicans have also condemned the vice president’s remarks, accusing her of stoking “the flames under a boiling cauldron of political misery.”

Republicans Mike Johnson, the speaker of the House, and Mitch McConnell, the Senate minority leader, issued a joint statement saying her rhetoric “risks inviting yet another would-be assassin” to target Trump and “endanger” American lives.

“We urge the vice president to take these threats seriously, stop escalating the threat environment, and help ensure that President Trump has the necessary resources to protect against these threats,” they said.