This is the next key talking point for a winning candidate, and may be the ultimate solution to US immigration. It can and will gain popular support, but it will take someone sneaky enough to gain their party's support on other matters first; either after becoming the party's nominee or after being elected. Either one.

(If you propose this after being elected you might only last one term though; it's a bit of a rug pull. Better to pull the rug out from under your party rather than the voters.)