President Donald Trump said he is not involved in running his family’s cryptocurrency business and cannot restrict his sons’ commercial activities simply because he is in office.

In a CBS "60 Minutes" interview at the White House on November 8, Trump said he does not know much about the business of World Liberty Financial, or WLFI, the crypto company run by his family.

Ross Douthat, a New York Times columnist who conducted the interview, noted that Trump is a co-owner of WLFI and that investors tied to the United Arab Emirates government also hold stakes in the company. He raised the possibility of conflicts of interest if foreign capital is invested in a business tied to the president’s family.

Trump acknowledged that he is a co-owner of WLFI but said he knows little about how the business is run. He added that he spends almost no time managing his own assets and that his sons handle those matters.

Asked whether selling his stake in the crypto company could ease conflict-of-interest concerns, Trump said his family’s business activities should be respected. He argued that it would be difficult to ask his sons to do no business at all for four years simply because he is president.

Trump said he did not know whether foreign investors could put money into WLFI to try to influence the president. He also argued that business conflicts involving presidents and people around them have arisen in past administrations as well.

The Trump family’s crypto business has recently come under scrutiny from Congress. Senator Richard Blumenthal, a Democrat, has requested materials from WLFI and related companies to examine possible conflicts of interest. No final findings have been released so far.