https://petapixel.com/2017/01/21/president-trumps-official-portrait/Trump's portrait settings: Canon 1Ds Mark III (announced back in August 2007 and since discontinued) using a Canon 70-200mm f/2.8L IS lens at 145mm, f/2.8, 1/320s, and ISO 640
Obama's first portrait: Canon 5D Mark II (announced in September 2008) at 105mm and 1/125s, f/10, and ISO 100
Obama's second portrait: Canon 5D Mark III and 85mm f/1.2L lens at 85mm, f/7.1, 1/125s, and ISO 200
Pic related - its from white house website