A dozen Republican members of Congress demanded Wednesday that the White House turn over information related to the business interests of President Biden’s family in order to “understand the extent of the Biden family’s use of its connection to the President to enrich itself.”

The letter to White House Counsel Dana Remus from the members of the House Oversight Committee seeks information on trips then-Vice President Biden took with son Hunter to China in 2013 and Mexico in 2016. It also asks for a list of “all past and ongoing foreign business interests and past and ongoing foreign relations for members of the Biden family,” as well as all “documents and communications regarding Hunter Biden’s artwork.“

The impetus for the letter, which was first obtained by Fox News, appears to be an upcoming exhibition of 15 of Hunter Biden’s paintings at galleries in Los Angeles and New York City later this year. Prices for the art will range from $75,000 for works on paper to $500,000 for the larger canvases.