NEW YORK — A New York federal judge on Wednesday nullified the suspension of horse trainer Bob Baffert, finding that the New York Racing Association acted unconstitutionally by failing to let him adequately respond to claims made against him after Kentucky Derby winner Medina Spirit failed a postrace drug test.

In her written ruling, Brooklyn Judge Carol Bagley Amon said a prompt post-suspension hearing where Baffert could refute the claims was required to meet constitutional muster.

But she said the racing association “had held no hearing — let alone a prompt one.”