WASHINGTON ¨C A top White House aide on Thursday promoted the clothing line named after President Donald Trump¡¯s daughter, Ivanka, drawing criticism from ethics experts one day after the president attacked a retailer for dropping her products.

¡°Go buy Ivanka¡¯s stuff ... I¡¯m going to go get some myself today,¡± Trump senior adviser Kellyanne Conway told Fox News in an interview from the White House. ¡°I¡¯m going to give a free commercial here: Go buy it today, everybody.¡±

Norman Eisen, who served as an ethics adviser to Democratic President Barack Obama, said Conway¡¯s comments amounted to an advertisement and violated government ethics law.

¡°It¡¯s a violation of the rule,¡± Eisen told MSNBC. ¡°It¡¯s a serious matter.¡±

Former Office of Government Ethics chief Don Fox told the Washington Post Conway¡¯s comments appeared to violate rules barring the use of public office for anyone¡¯s private gain.

Ivanka¡¯s brand was thrust into the headlines after her father on Wednesday attacked department store chain Nordstrom Inc. for dropping her products, in a highly unusual move that drew criticism for his use of a White House Twitter platform to intervene in a commercial matter.

The White House did not immediately respond to a request for comment over the ethics issue regarding Conway¡¯s remarks, and the Office of Government Ethics could not be immediately reached.

Other retailers that have dropped the Ivanka line include Neiman Marcus and HSN Inc., while Macy¡¯s Inc., TJX Cos, Hudson¡¯s Bay Co., which runs high-end chains like Lord & Taylor, and Dillards Inc. still carry it.

An ongoing campaign called #GrabYourWallet encourages shoppers to boycott products with ties to President Trump and his family. Separately, supporters have launched an alternative social media campaign called #BuyIvanka.

Ivanka Trump has said she would step away from her company when her father took office in the White House. A spokeswoman for the Ivanka Trump brand declined comment on Wednesday.