It probably was, but Trump was new to DC, and they needed someone to whip the votes. I've read, IIRC, that Trump fired him when it became clear he was trying to embezzle--or at least direct in an obscure way--campaign funds to unspecified advertising sources.
“I’ve read, IIRC, that Trump fired him when it became clear he was trying to embezzle—or at least direct in an obscure way—campaign funds to unspecified advertising sources.”
Interesting.