The President "fully supports his daughter", the spokesperson said, per the report.
She promoted the line named after Ivanka Trump, saying she is "going to get some of her stuff today".
"Go buy Ivanka's stuff, is what I would say".
The committee's chairman, Rep. Jason Chaffetz, R-Utah, told NBC News that he and Cummings are "jointly going to send a letter to the White House and Office of Government Ethics for a referral" on Conway. A federal employee may not "use his public office for his own private gain [or] for the endorsement of any product, service or enterprise".
While Donald Trump claims that Nordstrom dropping Ivanka's brand was a personal attack, the department store maintains that it was purely a business decision.
On Thursday, Conway appeared on Fox News to talk about Trump's response to Nordstrom's decision to pull his daughter's clothing line from its shelves.
"She's been counseled on that subject, and that's it", White House press secretary Sean Spicer said during Thursday's press briefing after taking a question from a Fox reporter.
If all she was doing was trying to enrich herself or Ivanka by shilling for the first daughter, it would, indeed, be an egregious breach of ethics. CREW claims that this violated the law against endorsements of products, and that it constituted a misappropriation of public funds because "a$3 ppropriations for the Executive Office of the President were not made for the goal of endorsing commercial products".
T.J. Maxx and Marshalls told employees last week to stop using signs promoting Ivanka Trump's brand and mix in her products with others the store sells to make them less prominent.
Larry Noble, the general counsel of the Campaign Legal Center, a nonpartisan organization of election law experts, said Trump's tweet was "totally out of line".
Retailers still selling Ivanka Trump products include Macy's, TJX Cos and Hudson's Bay Co.