The Ford Focus sold in Europe is assembled in Germany [1]. The current US border control security climate dates since the Obama Administration.
Also, surprise! European nations often sell their municipal bonds (to fund local projects) to American companies. Using Ford specifically as an example, I know someone who works for a local municipality in Finland and travels to Detroit every so often to sell their muni bonds to the US auto companies.
TL;DR the global flow of capital is absurdly interconnected. Trying to "hurt" a nation by not buying their goods can just as easily hurt your own country.
Car manufacturing is also a rather tough business to be in today - definitely not the money hiding type, but rather the "we build a factory in <insert industrial town with unemployment here> if you give some sort of tax break for a couple of years".
That is demonstrably and absolutely false.
Most of this stuff is a reaction to that, and it still lingers.
As for Canadians in Trump era: 'Refusals of Canadians at American land crossings dropped 8.5 per cent between October and the end of February compared with the same five-month period a year earlier, according to U.S. government statistics. The total number of Canadian travellers denied entry also dropped: 6,875 out of 12,991,027 were refused entry, a refusal rate of 0.05 per cent. Between October 2015 and February 2016, 7,619 out of 13,173,100 Canadian travellers were denied entry to the U.S., a refusal rate of 0.06 per cent.'
http://www.macleans.ca/news/number-of-canadians-turned-away-...