Sources familiar with the Republican tax negotiations say there's an acknowledgment within the working group that setting the corporate rate at less than 25 percent may be unworkable if the tax reform is going to be revenue neutral.
Why it matters: This is far from the number the administration wants, but a source familiar with the discussions said it's a simple numerical cash problem. They've done away with the border adjustment tax, health care repeal is failing, and there are no politically-palatable alternatives to fill more than $1 trillion in missing revenue.
None of this is to say that Trump has given up on radical tax cuts. He wants the federal corporate rate to move from 35 to 15 percent, and top economic adviser Gary Cohn and Treasury Secretary Steven Mnuchin want cuts of historic proportions. Neither Trump adviser is especially concerned about adding to the deficit in the short-term. The problem is finding the votes for that in Congress.