Staffers on Capitol Hill were calling it the Louisiana Purchase.

On the eve of Saturday's showdown in the Senate over health-care reform, Democratic leaders still hadn't secured the support of Sen. Mary Landrieu (D-La.), one of the 60 votes needed to keep the legislation alive. The wavering lawmaker was offered a sweetener: at least $100 million in extra federal money for her home state.

And so it came to pass that Landrieu walked onto the Senate floor midafternoon Saturday to announce her aye vote -- and to trumpet the financial "fix" she had arranged for Louisiana. "I am not going to be defensive," she declared. "And it's not a $100 million fix. It's a $300 million fix."

It was an awkward moment (not least because her figure is 20 times the original Louisiana...