Detroit (AP) - A federal judge on Thursday upheld the authority of the federal government to require everyone to have health insurance, dealing a setback to groups seeking to block the new national health care plan.

The ruling came in a lawsuit filed in Michigan by a Christian legal group and four people who claimed lawmakers exceeded their power under the Constitution's commerce clause, which authorizes Congress to regulate trade.

But Judge George Caram Steeh in Detroit said the mandate to get insurance by 2014 and the financial penalty for skipping coverage are legal. He said Congress was trying to lower the overall cost of insurance by requiring participation...