Donald Trump, accompanied by Donald Trump Jr. (from left), Ivanka Trump and Eric Trump at an event in 2016. New York Attorney General Barbara Underwood says the younger Trumps had exercised no real control over the Trump Foundation's activities, despite being nominal board members. Evan Vucci/AP hide caption
A federal court hears arguments in a case brought by Democratic lawmakers about whether the Trump Organization's business dealings with foreign governments violates the Constitution's Emoluments Clause. Spencer Platt/Getty Images hide caption
Donald Trump Jr. and Eric Trump, executive vice presidents at the Trump Organization, attend the Trump International Hotel And Tower Vancouver Grand Opening in February. Phillip Chin/Getty Images hide caption
Citizens for Responsibility and Ethics in Washington filed a suit just three days after President Trump took office. The suit alleges he is violating the Constitution's ban on accepting foreign payments, or emoluments. Win McNamee/Getty Images hide caption
Rep. Elijah Cummings, D-Md., ranking member of the House Oversight Committee, speaks to reporters on Capitol Hill in May. J. Scott Applewhite/AP hide caption
Ever since he won the election, Trump the president has done little to separate himself from Trump the businessman. Renee Klahr/NPR hide caption
The Trump Organization and celebrity chef José Andrés announced a settlement on Friday in the two-year legal dispute over a flagship restaurant in Trump's Washington, D.C. hotel. Above, the Old Post Office building in July 2015 under renovation before the hotel's opening. Susan Walsh/AP hide caption
The Trump Grill at Trump Tower in New York City in December. Now that Donald Trump is president, online reviews of his hotels, restaurants and other properties have become much more politicized. Jim Watson/AFP/Getty Images hide caption
U.S. Attorney Preet Bharara, shown here at a December news conference, is being urged to look into whether President Trump's businesses violate the Emoluments Clause of the U.S. Constitution. Mark Lennihan/AP hide caption
Donald Trump Jr. (left) and Eric Trump attend the inauguration ceremony for the Trump International Hotel and Tower in Vancouver, Canada, on Feb. 28. AFP/AFP/Getty Images hide caption
Trump Ethics Monitor: 2018 Promo Wide NPR hide caption
President Trump and first lady Melania Trump (hidden at left) have dinner with Japanese Prime Minister Shinzo Abe and his wife, Akie, at Mar-a-Lago in Palm Beach, Fla., on Feb. 10. Trump said he would personally pay for the visit to his resort . Susan Walsh/AP hide caption
The Trump International Hotel and Tower opened in Toronto on April 16, 2012. In the years since, "There were parts of the building itself that fell down onto the street and actually shut down parts of our downtown at times, because there were concerns about the structure's integrity," says a city council member. George Pimentel/WireImage hide caption
White House press secretary Sean Spicer said Wednesday the president is adding lawyers to his staff to handle ethics complaints. Susan Walsh/AP hide caption