All of the returning members of the Democratic caucus in the U.S. Senate but one signed a letter that supports filibuster reform initiated by New Mexico’s Tom Udall, according to story in the National Journal by Dan Friedman,

The letter was sent to Senate Majority Leader Harry Reid urging him to change filibuster rules.

Senior caucus members Reid and retiring Senator Christopher Dodd, have been skeptical. Dodd warned against altering Senate rules in his farewell speech this month. He is the only Senate Democrat who did not sign the letter to Reid, aides said.

The fact that every returning Democrat signed the letter, except for Dodd, underscores growing determination on the part of the Senate’s majority to raise the bars for filibusters.

Udall cites Article 1, Section 5 of the U.S. Constitution, specifically the portion which says -- Each House may determine the Rules of its Proceedings.

Udall says that on the first day of the new Congress, the Senate can pass new rules with a simple majority.