Rep. Elijah Cummings (D-MD) on Thursday asked House Oversight Committee Chairman Rep. Jason Chaffetz (R-UT) to refer White House aide Kellyanne Conway for potential disciplinary action after she plugged Ivanka Trump’s fashion and accessories line during an interview.

In a letter, Cummings said that Conway’s comments appear to be a “textbook violation” of ethics laws and recommended that it be referred the Office of Government Ethics.

“This appears to be a textbook violation of government ethics laws and regulations enacted to prevent the abuse of an employee’s government position,” Cummings wrote.

Cummings outlined the laws he thought Conway may have been in violation of when she appeared on Fox News Thursday morning and said “Go buy Ivanka’s stuff.”

“I’m going to just give a free commercial here. Go buy it today everybody. You can find it online,” Conway added in the interview.

Cummings is not alone in his view of her comments. Rep. Ted Deutch (D-FL), ranking member on the House Ethics Committee, tweeted about Conway’s “commercial,” suggesting the Office of Government Ethics could be looking into it.

Read the entirety of Cummings’ letter below: