US President Donald Trump has doubled down on his support of actress Sydney Sweeney, amid backlash and claims of “racist” undertones in her American Eagle Jeans campaign.

The Euphoria star was announced as the face of clothing brand American Eagle’s new jeans campaign last Thursday. The advert’s tagline is “Sydney Sweeney has great jeans” with the word “genes” crossed out.

In the voiceover Sweeney says: “Genes are passed down from parents to offspring, often determining traits like hair colour, personality and even eye colour. My jeans are blue.”

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The choice of wording and the emphasis on her blonde hair and blue eyes sparked outrage online with commenters going as far to claim it had sinister implications.

Commentators slammed the ad campaign online saying it promoted eugenics, “white supremacy” and linking it to Nazi ideology.

Sweeney was later outed as a registered Republican, which caused even further backlash but Trump offered high praise for the actress.

“Sydney Sweeney, a registered Republican, has the ‘Hottest’ ad out there,” Trump wrote on his Truth Social platform.

“It’s for American Eagle, and the jeans are flying off the shelves. Go get ’em, Sydney!

“The tide has seriously turned — being WOKE is for losers, being Republican is what you want to be.”

On Tuesday, White House correspondent Amanda Head spoke to Sunrise hosts Nat Barr and Matt Shirvington about Trump’s endorsement of Sweeney.

“There are a lot of folks out there who have theorised that she is maybe not necessarily conservative, not necessarily a Trump supporter, she is just not a crazy liberal,” Head said.

“(This is) evidenced by the fact that last year she came under fire because one of her parents hosted a party and apparently it was Trump themed. Later, she refused to apologise.”

Head welcomed the fact corporate America is no longer apologising for advertising campaigns.

“It is good to see that in corporate America they are not apologising anymore ... by the way, (American Eagle) stocks surged after that.

“Dunkin Donuts came out with an ad with this brooding Texas actor, Gavin Casalegno, with the same type of messaging as far as the genetics.”

Head also noted an advert featuring WNBA player Sophie Cunningham in a T-shirt reading: “Hot Girls Eat Arby’s.”

“A lot of people are calling that misogynistic and objectifying women and none of these organisations are apologising,” Head said.

“So, it’s kind of nice to live in a culture now where corporations no longer have to apologise for doing the age-old marketing tactic of good-looking people trying to sell you things.”