On the day Donald Trump became president of the United States, while inauguration festivities were still in full swing, he officially launched his 2020 reelection campaign. Donations poured in from more than 50,000 people across the country. But according to the latest federal filings, Trump still has not donated a penny of his own, while his businesses continued to charge the campaign for hotels, food, rent and legal consulting. That means the richest president in American history has turned $1.1 million from donors across the country into revenue for himself.

Rick Scott had been governor of Florida for barely three months when questions first mounted about conflicts of interest. Fabulously wealthy but a newcomer to politics, Mr. Scott mandated random drug testing for state workers in March 2011, and was pushing the legislature to require it for welfare recipients. The Republican governor, who had made his fortune as a health care executive and investor, also proposed reorienting the state’s Medicaid system toward managed care.

A shell company created by Paul Manafort the same day he left the presidential campaign quickly received $13 million in loans from the businesses with ties to Mr. Trump, including one that partners with a Ukrainian-born billionaire and another led by a Trump economic adviser. They were among $20 million in loans secured by properties belonging to Mr. Manafort and his wife.