We have to get control of our borders. You can only do that if you make companies obey the law and not hire undocumented or illegals. They can only do that is if they have a Social Security Card that has biometrics so they know whether the person is legal or not.
Most illegals are without health insurance and when these workers need emergency healthcare the American taxpayer gets stuck with the bill.
As the prospect of a Tory government gets nearer many traditional Labour voters - some who switched away in recent times and many who stayed at home - seem more determined to prevent that happening.