I'm impressed! Who did you clerk for?
Think was referring to Gorsuch having been a clerk on the court in the past. Gorsuch is familiar with the process and may not like it.
Actually, the rule in grammar is that the modifying clause be related to the noun that is closest to it.
I wrote: “Having been a clerk in that court, Gorsuch probably knows...”
The clause relates to Gorsuch. It is not a dangling modifier.
The pronoun “I” does not appear anyplace in the sentence.
I'm impressed! Who did you clerk for?
No, the phrase was correctly used to modify the subject of the sentence, which was Gorsuch.