evidence: Trump is not the first president to donate his salary. Former Presidents John F. Kennedy and Herbert Hoover, both wealthy before they took office, donated all their earnings. Forbes reports Trump’s net worth as of July 9 at $2.1 billion, making him the first president to be a billionaire. [...] According to news coverage and White House news releases, Trump has written checks equal to a quarter of his $400,000 annual salary every quarter to various government agencies: [...] - White House Press Briefing, April 3, 2017 - White House Press Briefing, Nov. 30, 2017 - White House Press Briefing, Feb. 13, 2018 - White House Press Briefing, May 17, 2018 - USA TODAY, "President Trump donates $100,000 of his salary to Surgeon General's office," Aug. 16, 2019 - Tweet from President Donald Trump, March 18, 2019 - AgriPulse, "Trump to donate Q1 salary to USDA," May 16, 2019 - PBS NewsHour, "Trump donates his 3rd-quarter salary to fight the opioid epidemic," Nov. 26, 2019 - Tweet from Kayleigh McEnay, March 3, 2020 - Vox, "Trump donated $100,000 of his salary to fight coronavirus. He’s made much more than that off the presidency," March 4, 2020 - The Washington Post, "Trump seeks to slash $8.5 billion from Education Department budget," March 11, 2019 - The Office of the General Counsel, "Principles of Federal Appropriations Law"