{{So hard to remember which papers are de facto rags nowadays... (rhetorical question for inherent biases) is the Guardian one of them???}}

The travel decrease had actually been noticed for several months before the election.  The US Dept of Commerce(whose website disclaimer says numbers for August are still preliminary/unofficial...) show a strong slide going back as far as April of last year.

That aside, a noticeable portion of the decrease is simple protest (ie: doesn't matter what Trump does/doesn't do, people are doing it out of spite).  It has nothing to do with risk or reality.  

Quite frankly, this makes me happy; they slump and prices will come down and I can save a bundle!  Thanks Chicken Little!!