So far, the court has ducked the key issue: whether school-voucher plans which allow parents to use state-funded vouchers to send their children to private religious schools breach the separation of church and state enshrined in the first amendment.

ECONOMIST: The Supreme Court

But once the issue gets to Congress, the voucher idea in particular may be met with resistance.

CNN: Education, tax cuts top Bush's Washington agenda

In all but exceptional cases, Trussell Trust food banks will only issue a food parcel to someone with a voucher from an accredited agency.

BBC: Food banks used by thousands of jobless, figures show