David Frum : Heritage Foundation report estimated cost of immigration reform . Comment: Maybe Richwine did his math wrong . Frum : Co-author 's views reprehensible , but that does n't invalidate Heritage findings . Frum : Immigration reform will add substantial costs for entitlements .
David Frum : Heritage Foundation report estimated cost of immigration reform . Comment: Frum : Co-author 's views reprehensible , but that does n't invalidate Heritage findings . Frum : Immigration reform will add substantial costs for entitlements .