I'll believe it when I see it.
Keep in mind that visa waiver is generally a two way street. If the US closes the door, US citizens will need a visa too in order to travel. Although I have an idea that most Trump supporters probably do not own a passport so probably do not care about that.
Here is a list of countries whose citizens can visit the US under the visa waiver program:
Andorra
Australia
Austria
Belgium
Brunei
Chile
Czech Republic
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Iceland
Ireland
Italy
Japan
Latvia
Liechtenstein
Lithuania
Luxembourg
Malta
Monaco
Netherlands
New Zealand
Norway
Portugal
San Marino
Singapore
Slovakia
Slovenia
South Korea
Spain
Sweden
Switzerland
Taiwan
United Kingdom
Do you figure all of these countries are more economically advanced than Canada?
