White House chief of staff John Kelly John Francis KellyMORE has been increasingly irked by first daughter Ivanka Trump Ivana (Ivanka) Marie TrumpTrump, Biden vie for Minnesota Trump luxury properties have charged US government .1M since inauguration: report Ivana Trump: Ivanka could 'definitely' be first female president MORE's role in the administration, according to CNN.

Sources tell the news network that Kelly believes Trump is blurring the lines between first daughter and senior adviser to the president.

Kelly has reportedly said privately that the first daughter is "playing government," and referred to her child tax credit as "a pet project."

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The report follows Trump's trip to the closing Olympic ceremonies in Pyeongchang, South Korea last week, which has reportedly sparked concerns among some in the White House, including Kelly.

"This isn't like going to Italy. The stakes are far higher and more complex," a source close to President Trump told CNN.

Kelly reportedly voiced his concerns behind closed doors about the first daughter's lack of diplomatic experience, but the White House insisted on Monday he was supportive of the visit.

"General Kelly and General [H.R.] McMaster were supportive of the trip since the planning process began," White House press secretary Sarah Huckabee Sanders told CNN. "We all thought it was a great success. Ivanka was a great representative for the administration."

Ivanka Trump faced backlash on Monday after she said during an interview with NBC that it was inappropriate to ask her about the sexual misconduct allegations against her father, despite serving as a senior adviser to the president.