Will U.S. District Judge Roger Vinson Halt Obamacare Implementation?

According to this report, the smart money says U.S. District Judge Roger Vinson will stop Obamacare implementation in the26 states that brought the suit.

(Politico) — U.S. District Judge Roger Vinson has already dealt the Obama administration a staggering blow on health reform, and this week the administration may get another one from the fiery Florida judge.
Obamacare
The Justice Department asked Vinson to clarify his ruling that struck down the law as unconstitutional. Justice must file its brief on the motion by Monday, and Vinson has said he would rule quickly after that. At issue is whether Vinson meant to stop reform implementation in the 26 states that brought the suit.

The smart money says Vinson will halt implementation, and legal observers are wondering why Justice would take that risk.