A pair of U.S. senators have asked for a probe into Ivanka Trump’s endorsement of Goya Foods for violation of federal ethics rules.

A few days back, Donald Trump’s first daughter, Ivanka, created a controversy by endorsing Goya Foods shortly after the company’s CEO praised POTUS. Now the senators believe that an investigation should be carried out to confirm if Ivanka violated federal ethics rules by her endorsement of the company.

Latino food company Goya’s CEO Robert Unanue praised Trump during a July 9 roundtable with Hispanic leaders at the White House. He said “we’re so blessed” to have Trump as a leader.

Shortly afterward, Ivanka posted a photo holding a can of Goya black beans. She even gave Spanish and English translation of the company’s slogan “If it’s Goya, it has to be good. Si es Goya, tiene que ser bueno.”

The post was shared by her on Instagram, Twitter and Facebook.

The two U.S. senators that have requested for an investigation to be carried out include Sens. Tom Carper (D-Del.) and Elizabeth Warren (D-Mass.). They send a joint letter to the Office of Government Ethics on Monday, July 19.

In the letter, they inquired about the possible disciplinary action that could be imposed on Ivanka.

“The timing of her remarks creates the appearance, at least, that praise for Trump Administration officials may elicit later endorsements from these same officials,” mentions the letter.

After the uproar created by Ivanka, the White House defended her actions. However, it did not answer specific questions concerning her ethics training.

“This tweet was made in her personal capacity voicing her personal support,” White House press secretary Kayleigh McEnany justified after Ivanka was criticized. “This complaint is another politically motivated, baseless attack from an organization with a vendetta against all of the administration.”

Several people from within the Trump administration are known for crossing the ethical lines that are otherwise followed as a part of the code of conduct. Trump himself has long been criticized for the use of his position for his benefit. Even several of his close aides have been accused of using their platform for Trump’s campaign.

Ivanka Trump Eric Trump Republican Presidential Candidate Donald Trump visits his Scottish golf course Turnberry with his children Ivanka Trump and Eric Trump on July 30, 2015 in Ayr, Scotland. Donald Trump answered questions from the media at a press conference. Jeff J Mitchell/Getty Images