You have far more faith than I do. If Trump wins a second term, they'll make a big show of negotiating a trade deal with Britain and the EU after Brexit is realized.
If those negotiations break down they may use economic sanctions to show they mean business.
I’m as appalled at our government’s foreign policy as the next person, but I would bet my bottom dollar on there not being a blanket government mandated EU IP ban in the next four years regardless of the election results. There’s a long way between tariffs and targeted export restrictions for the EU, and the lobbying to NOT cut off all US internet businesses from the EU would be insane.