In the United States, as elsewhere, people overestimate the share of the population who are immigrants.

The New York Times has a good primer on the movement of people around the world and how that movement is seen by people in the United States and elsewhere.

There were fewer undocumented immigrants living in the United States in 2016 than in 2007. Apprehensions along the border with Mexico plummeted last year to their lowest level since 1971. Things may change if, say, Mr. Trump decides to leave the North American Free Trade Agreement, setting off another economic crisis in Mexico. Still, the United States seems more likely to suffer from a lack of immigrants than from a continued surge.

In the United States, as elsewhere, people overestimate the share of the population who are immigrants - "They underestimate immigrants’ education and overestimate both their poverty rate and their dependence on welfare."

No matter how much we talk about the reality of migration, it's important to keep talking about it. For whatever reason (fear, ignorance, partisanship, a misinformation campaign, etc.), the message isn't entirely getting through. Fortunately, and perhaps surprisingly, US public support for immigration remains strong while support for Trump's approach remains weak.