While The Donald and the rest of the Tea-GOP are fond of freaking out over the supposed crisis caused by a massive influx of migrants to the USA from Mexico, the actual facts point to zero net migration from Mexico since 2010.
A combination of economic and demographic factors have changed the immigration trend, which is not likely to reverse again soon.
Barring truly massive shocks to the Mexican economy or political system, we are extremely unlikely to see another great wave of immigration for at least the next 20 year to 40 years. And that would only happen if Mexico reverses a half-century of declining fertility rates within the next few years.
Don’t expect to hear this from anybody in the Tea-GOP, even though it really might help them politically if the immigration issue went away.