White House adviser Kellyanne Conway has been "counselled" after a possibly illegal comment that people should "go buy Ivanka [Trump's] stuff"
The comment came after American department store Nordstrom announced last week that it was no longer stocking Ms Trump's fashion line due to poor "brand performance".
And it has one expert thinking the endorsement may have broken the law.
Ms Conway made the plug on Thursday (local time) in an interview with Fox News, a day after President Donald Trump tweeted in support of his daughter.
White House spokesman Sean Spicer confirmed the latest development at his daily press briefing.
"Kellyanne has been counselled, and that's all we are going to go with," he told reporters in response to a question.
"She's been counselled on the subject, and that's it."
Ms Conway called Ms Trump a "champion for women empowerment" and said she was "a very successful businesswoman".
"Go buy Ivanka's stuff, is what I would tell you," Conway said. "It's a wonderful line. I own some of it. I fully - I'm going to just, I'm going to give a free commercial here: Go buy it today, everybody. You can find it online."
According to CNN, it is illegal for public employees to use their positions "for the endorsement of any product, service or enterprise, or for the private gain of friends, relatives, or persons with whom the employee is affiliated in a nongovernmental capacity."
Larry Noble of the Campaign Legal Center, a nonpartisan organisation of election law experts, told CNN he was of the opinion that Ms Conway "may have violated the law".
Ms Trump has no formal role in her father's administration, but has sat in meetings with foreign officials and business leaders. Her husband, Jared Kushner, is an adviser to the President.
Her clothes have also been pulled from the shelves of department store Neiman Marcus but are still sold at Macy's, the US' largest department store chain, as well as at Bloomingdale's.
A social media campaign called #GrabYourWallet has been encouraging shoppers to boycott products with ties to President Trump and his family. Ms Trump's supporters have launched an alternative social media campaign called #BuyIvanka.
AAP / Newshub.