Minds are changing on Too Big to Fail. A month ago, it was just something in the air. Now, it looks like we’re headed for a real legislative confrontation. And man, is the finance sector freaking.

Last week, on April 24th, Democratic Senator Sherrod Brown of Ohio and Louisiana Republican David Vitter introduced legislation called the “Terminating Bailouts for Taxpayer Fairness Act of 2013 Act,” or the “Brown-Vitter TBTF Act” for short. The bill is a gun aimed directly at the head of the Too-Big-To-Fail beast.

During the Dodd-Frank negotiations a few years ago, Brown teamed up with Delaware Democrat Ted Kaufman to introduce an amendment that would have physically capped the size of the biggest banks. The amendment was bold and righteous but was slaughtered on the floor by a 61-33 margin, undermined by leaders of both parties – 27 Democrats voted against it.