Please let this be just an elaborate hoax*...
*(The problem with just assuming that this IS a hoax - since both the White House and the German government sources deny it - is that 1) sane people in both governments have powerful reasons to deny the the Tangerine Toddler may actually have done this while, given his oft-stated position that the chintzy Eurotrash are welching on their NATO budgets, it seems eminently possible that he WOULD do something just like this, and 2) this is the same week that the White House simply flat-out lied about Trump's golfventures, one more in the seemingly countless ridiculously pointless lies that emerge from this Administration.
Ridiculous because they have made lying their coin and it has become extremely difficult to believe they're NOT lying when they assert something they want to be true or deny something they wish weren't; that's the difference between the sort of "normal politician lies" and "Trump Administration lies". The latter could be, and have been, without any genuine rationale or need, and one of the enormous problems with this sort of constant lying. Soon even the truth is assumed to be an imposter within the bodyguard of lies...)