IMHO, "The Donald" is like a "tough guy" (using the ice hockey slang), but his field is business and economics, and the political issues should be projected on that plain (or vice versa). It is crystal clear that pressing the Europeans to raise their military budgets means that at least half of this increase would land in the hands of US companies producing weapons. As far as mil. aviation is concerned, there are no European competitors to F-35 and SAMs like PAC-3, THAAD, AeGIS. I assume that with other forces the US would benefit as well.
Even considering that NordStream-2 gas project, for Trumps it's a competition and all means are OK to achieve the goal. Supress the Russian tube and bargain instead his liquid stuff. I assume that his position in talks with Putin will be clear and simple: "Nothing personal, Vlad, it's just business. If you have a stick to scare those guys, you may use it as well, but you don't have any, while I do have
"