Well, that might do it. Latest figures I saw (2013) put U.S. aid to Mexico at $419 million.  Not a whole lot, by some standards (Afghanistan received over a billion. Actually, come to think of it, Trump would have my vote--if I was an American citizen--if just stopped aid to THAT country.  I feel the same way about our own...)

Mexico ranks in the low end of the top 15 recipients of American Aid.  Afghanistan is near the top.