Dodd-Frank was not exactly a brutal piece of financial regulation even when it first passed. In fact, it was so watered down that its overall effect was always likely to be pretty modest. Since then, though, it's gotten watered down even more. Why? Because banks are very, very rich and very, very connected, while financial reformers....aren't. The chart below tells the story at a glance, showing the number of meetings to discuss regulatory interpretation and implementation over the past three years. As you can see, the reform groups never had a chance.
This comes via Erika Eichelberger, who has more here. Note that Goldman Sachs alone accounts for 222 of these meetings.