While much of Washington grapples with international crises, chronic economic troubles and upcoming midterm elections, Senate Democrats are steadily pushing forward with what they hope will become the 28th Amendment to the U.S. Constitution.The proposed amendment would give Congress authority to regulate every dollar raised, and every dollar spent, by every federal campaign and candidate in the country. It would give state legislatures the power to do the same with state races.Framed by Senate Majority Leader Harry Reid as a response to campaign spending by the conservative billionaire Koch brothers, the proposed amendment, written by Democratic Senators Tom Udall and Michael Bennet and co-sponsored by 42 other Senate Democrats, would vastly increase the power of Congress to control elections and political speech.The problem is, Democrats aren't quite sure exactly what the amendment should say. In a move that received virtually no attention, they recently rewrote the measure -- and in the process revealed its fatal flaw.Republicans characterized the Udall-Bennet amendment as a clear infringement of First Amendment free speech rights, as well as a particularly naked power-grab by Congress.