Trump tweeted on January 26, 2020, about having appointed 191 Judges, which he claims to be a record to this point in a Presidency.
While he has clearly appointed more than 191 judges in total, he has only appointed 187 Judges under Article III, which in the greater scheme of things are the only Judges that matter.
187 total Article III Judges to this point, consisting of 2 Supreme Court Justices, 50 Circuit Judges, 133 District Judges and 2 Trade Court Judges.
Under Article I, he has appointed 11 Judges total. 5 to the United States Court of Federal Claims. 4 to the United States Tax Court. 1 to the United States Court of Military Commission Review. 1 to the United States Court of Appeals for the Armed Forces.
He has appointed 0 Judges under Article IV.
So perhaps he is counting the Tax Court Judges, the 4 of which would account for the error. But they are Article I and generally when you generically refer to a Judge count, you are referring to Article III Judges. Again, the only ones that really matter from a “legacy” perspective.
In any event, the proper number is 187.