If people in other countries could vote in the Presidential elections.. eg the Netherlands, Britain

.. How would they vote?

I don't know about other countries, but in The Netherlands there is at least one pollster which has asked about exactly this a couple of times this year already. I would guess that there are pollsters in other countries, especially in Europe, that have done so as well?

In the Netherlands, findings were a little ... lopsided. On February 7, a whopping 76% said they'd vote for Hillary Clinton, and just 16% for Donald Trump. On May 8, things were a tad tighter: 70% to 21%. And on June 19, the divide had opened up wider again: 73% to 16%. A chart doesn't add much with that kind of numbers, but here goes:



The pollster (Maurice de Hond) provided a breakdown by party preference as well. It turns out that the only Dutch party whose voters appreciate Donald Trump is the Freedom Party. That's the anti-Islam, anti-immigrant, anti-EU, party of Geert Wilders:



Back in May, a plurality of Freedom Party voters preferred Trump (49%) over Clinton (40%). But by June, the balance had already reversed itself again, and they broke for Clinton 46% to 41%. Which is kind of remarkable, considering that Geert Wilders himself last year tweeted that he hoped Trump would be the next U.S. President.

Freedom Party voters only make up about a quarter of Dutch voters though. (The numbers on the left in that link refer to seats, not percentage points; there are 150 seats in the Dutch parliament.) And the rest of the Dutch electorate isn't having Trump.

Centrist and center-left voters (Labour, the Democrats, the Greens) are most solidly on the side of Hillary, giving her 93-99% of their votes in these three polls. Trump isn't doing any better with Socialist Party voters, but those have been a tad more likely to say they had no preference. And even voters of the mainstream right (the VVD of Prime Minister Mark Rutte and the Christian-Democratic party) are preferring Clinton over Trump by massive majorities (80% to 11% resp. 86% to 8% in the last poll):



Since Dutch voters so clearly prefer the Democratic candidate in the race, it's maybe also interesting to see how Dutch voters viewed the Democratic primary contest. The same pollster asked about that back in February:



With the exception of Freedom Party voters (and to a lesser extent, Socialist Party voters), most Dutch voters had an opinion/preference. And mostly, they preferred Hillary. Support for Hillary was strongest among mainstream, center-left and center-right parties. Support for Bernie was, unsurprisingly, strongest among Socialist and Green voters. Even among them, though, twice as many preferred Hillary than Bernie.

That's probably partly a matter of name recognition and familiarity, partly a reflection of how popular the Clintons are in Holland, and maybe partly an indication of the traditionally pragmatic outlook of the Dutch, who'd rather leave all the revolution stuff to the French. :-)