Not really.
But the point is moot, since (1) Dr. Mohler can say whatever he wants and it doesn't threaten Salazar in any way and (2) Salazar, as a supporter of abortion, isn't really a Catholic in the first place.
Sounds like a case of those who put themselves outside of what the Church teaches and then points the finger at other, believing groups because it interfers with his leftist compromise with the Gospel.
Indeed. It seems ridiculous that Mr. Mohler cannot declare his faith to be, in fact, correct. But certainly the Catholic church in theology if not in practice maintains that they find serious questions with the salvation of Protestants. To find Mohler's statement out-of-bounds is absurd.