Archbishop Carlo Maria Viganò (79) has been in RETIREMENT since January 2016. He is NOT a cardinal & he is no longer a part of the Vatican bureaucracy.
Actually he is an OUTCAST as far as the Pope & the mainline Church is concerned. A pariah. A gadfly.
He has no standing or say in what the Vatican says, thinks or does. I know that I have more standing at the Vatican than does he — & I am a confirmed, born-again HEATHEN!
So, an endorsement from Viganò is pretty meaningless. It could even be a negative. An impediment.
Trump, obviously, has no clue about the Catholic Church, its workings & its sacrosanct politics. If he did he would have ignored anything that Viganò said.