House Oversight Committee Chairman Rep. Jason Chaffetz (R-Utah) said he will refer White House senior adviser Kellyanne Conway for an ethics investigation, after she promoted Ivanka Trumps fashion line during a Thursday appearance on Fox News .

Chaffetz told reporters on Capitol Hill that Conways remarks were clearly over the line and unacceptable, and that he and the top Democrat on the committee, Rep. Elijah Cummings (D-Md.), would jointly refer Conway to the Office of Government Ethics for an investigation.

It should have never happened, and they better learn this lesson very quick, Chaffetz told NBC .

Chaffetz was referring to Conways appearance on Fox and Friends Thursday morning, when she defended President Donald Trump s attack against Nordstrom for dropping his daughters fashion line by advertising the brand .

It is just a wonderful line. I own some of it, Conway said. Im going to give a free commercial here. Go buy it today, everybody. You can find it online.

Conway appeared to violate a federal regulation stating that government employees cannot use their public office to endorse products, quickly raising complaints from ethics watchdog groups.