Can Wall Street intimidate pro-regulatory senators?

That’s the question posed by this Reuters story, which suggests that big banks will retaliate against the pro-regulatory proposals of Senators Elizabeth Warren and Sherrod Brown by withholding campaign contributions from Senate Democrats.

Sen. Warren, for her part, does not plan to play along, she explained in a blog post (entitled "Wall Street isn't happy with us") on her web site: "They can threaten or bully or say whatever they want, but we aren't going to change our game plan. . . . It's up to us to fight back against a financial system that allows those who broke our economy to emerge from a crisis in record-setting shape while ordinary Americans continue to struggle."