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A federal judge struck down a Florida law requiring people who receive welfare to undergo drug testing.

The judge said the law is unconstitutional, which makes a temporary ban enacted last year permanent. Florida Gov. Rick Scott said he vows to appeal the decision.

Gov. Bill Haslam signed a similar law in Tennessee in 2011. The law gives the state until July 1, 2014 to begin screenings. State Sen. Stacy Campfield sponsored the bill.