PZ Myers calls this the action of "demented fuckwits":
Responding to complaints from the Religious Right, Congress has passed legislation mandating that the phrase "In God We Trust" be moved from the edge to the back or front of the new presidential dollar coins.
President George W. Bush signed the measure into law Dec. 26. It was tucked into a $555 billion domestic spending bill after having been pushed by U.S. Sen. Sam Brownback (R-Kan.). Brownback and other Religious Right conservatives have been complaining about the new coins since the series started last year.
I wonder how the Minnesota Delegation voted on this.