Even before the U.S. Supreme Court’s travel ban decision came down, President Donald Trump was gesturing again at massive changes in in immigration law to be made by executive fiat.

In recent tweets and speeches, Trump has declared that undocumented immigrants cannot be allowed to “invade our Country,” that “when somebody comes in, we must immediately, with no Judges or Court Cases, bring them back from where they came,” and that “we don’t want judges; we want security at the border?”