Salvini should be invited to the WH, flown down to Maralago on AF1, play a round with our VSGPOTUS, and then the press conference.
Might not be the best use of his time right now. He is going around from city to city talking up the popular coalition and doing a great job of it, while defending Italy’s recent actions on the migrant front.
Since the whole thrust is the Italian culture and identity, I don’t think they need the big dog America right now. The situation in the Middle East is different, where all the countries are choosing sides and an alliance with Trump is desirable.