Both the United States and Canada are examples or countries who have

Canada–United States relations covers the bilateral relations between the adjacent countries of Canada and the United States. Relations between Canada and the United States historically have been extensive, given a shared border (the longest in the world) and ever-increasing close cultural, economical ties and similarities. The shared historical and cultural heritage has resulted in one of the most stable and mutually beneficial international relationships in the world. For both countries, the level of trade with the other is at the top of the annual combined import-export total. Tourism and migration between the two nations have increased rapport, but border security was heightened after the September 11 terrorist attacks on the United States in 2001.

Explanation:

i honestly have no idea