Sen. Ted Cruz launched his bid for the Republican presidential nomination this week by promising to "finally, finally, finally secure the borders" and put an end to unauthorized immigration. This will warm the hearts of restrictionists, no doubt. But it should scare Americans who love their pocketbooks and liberties more than they hate undocumented Latino immigrants. Restrictionists accuse many of these immigrants of being welfare queens who come to America illegally and live off taxpayers.