Incoming business and pleasure travel to US down first half of 2017.

I-94 Program: 2017 Monthly Arrivals Data from the National Tourism and Travel Office (preliminary) attempt to quantify the number of non-residents visiting the US for business or pleasure.

In particular is the dramatic decline of travel from Eastern Europe, Middle East, Africa, South America, Central America and the Caribbean.  All regions of the World had a reduction of travel between 2017 and 2017 (Arrivals of World Regions).

Countries sending a large percentage of Business travelers (20 % of all travel) were Germany, Italy, Netherlands, and Ireland (Top 20 Tourist-Generating Countries).

Is this a reflection of Trump Slump?  Could be.