Foreign-born highest since 1890 — shock new figures show how much Biden changed America

Julian Zelizer: Immigration has profound implications for taxpayers, schools, American workers, and our ability to assimilate so many people.

The public senses this level of immigration is unsustainable, which is a key reason they elected Donald Trump .

Immigration also has implications for American workers and schools, Zelizer says.

President Trump is right to want to control the border and enforce our immigration laws, but the failure to enforce the law is only part of the problem.

The fundamental problem is that policymakers never grapple with the sheer scale of immigration, legal or illegal.

Thinking about immigration policy without regard to overall numbers is like budgeting without regard for how much money is being spent.