He's a Senator, not a Congressman.
I was wondering whether the lone "no" was Amash, or Massie - had to be one of the two. Sure enough, one of those guys came through. I wouldn't be surprised if Amash simply sat this one out and didn't vote at all (or voted "present"), rather than open himself up to accusations that he would only vote against it because of his ethnic background. I'm interested in hearing his reasoning as well.