Trump made some recent comments that were not quite accurate in regards to his judicial appointments.
First of all, President Carter still holds the single term judicial appointment record and likely will still hold it when the current Presidential term expires on January 20th 2021.
Including a United States District Judge that will be confirmed tomorrow (9/24/20), Trump will have appointed 218 Article III Judges, including 2 Supreme Court Justices, 53 Circuit Judges, 161 District Judges and 2 Trade Court Judges.
Carter appointed 262 Article III Judges including 0 Supreme Court Justices, 56 Circuit Judges, 203 District Court Judges, 1 Judge to the United States Court of Claims and 2 Judges to the United States Court of Customs and Patent Appeals.
Trump would need to make 42 more Article III appointments to tie Carter and 43 to take the record outright. Trump currently has 34 District Judge and 1 Trade Judge nominee pending. Add Barrett’s likely nomination (and the Circuit Judge nomination to fill Barrett’s existing seat) and that is a total of 37 Article III nominees. Barrett’s nomination and the replacement Circuit Judge nomination will both consume a substantial amount of the Senate’s time, crowding out some of the District Judge nominees and the Trade Court Judge nominee.
Realistically, Trump will get at the outside 25 more Judges confirmed, leaving him well short of Carter’s record, though he will have sole possession of second place.
Percentage wise, Trump’s 218 appointments out of 870 Article III Judgeships total is 25.06%.
Carter’s 262 appointments out of the then existing 672 Article III Judgeships total is 38.99%.
Reagan’s 383 appointments out of the then exist 757 Article III Judgeships total is 50.59%.
Of course, nobody is likely to beat Washington’s 100%. But Reagan has the highest percentage in the modern era.