Grassley, who crafted the bill with the committee's ranking Democrat, Max Baucus, D-Montana, reminded his colleagues their bill reflects an evenly divided Senate where neither party's legislation can pass intact.

CNN: Senate poised for tax bill vote

The obvious Democrat to take the role of Bill Bradley would be Max Baucus, the Senate Finance chairman.

WSJ: The Weekend Interview with Dave Camp: Is Tax Reform Politically Possible?

Charles Grassley, the ranking GOP member on the Senate Finance Committee, has been working with his counterpart Max Baucus to write his committee's bill.

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