Nobody thinks Trump should've quit making profits after being elected. But he should've done what other presidents did, and set his assets into a blind trust after he was elected.
US Constitution is clear: “[N]o Person holding any Office of Profit or Trust under [the United States], shall, without the Consent of the Congress, accept of any present, Emolument, Office, or Title, of any kind whatever, from any King, Prince, or foreign State.” The People’s Republic of China and companies substantially controlled by the PRC government paid at least $5,572,548 to Trump-owned properties while Trump was in office. 😉