Why does our President allow the Mexican goverment to interfere into US affairs?

We hear El Presidente Calderon chastising the American President regarding the immigration policies of the United States which I believe is disgraceful. If we are the most powerful country on the face of the earth why do we take this tongue lashing from this third world despot? Americans must vote politician into power this next election with backbone who will tell the El Presidente to feed and take care of his own people.