Hope for filibuster reform, by @DavidOAtkins

The Senate postponed debate on reforming the filibuster Thursday, as advocates cited the support of 48 senators for eliminating the silent filibuster using the so-called constitutional option, a measure that requires 50 votes plus that of the vice president.

During a briefing on Capitol Hill, Sens. Jeff Merkley (D-Ore.) and Tom Udall (D-N.M.) updated reporters on their joint effort, which is also being shepherded by Sen. Tom Harkin (D-Iowa).

The remaining seven within the Democratic caucus who have yet to sign on are Sen. Carl Levin (D-Mich.), Sen. Mark Pryor (D-Ark.), Sen. Patrick Leahy (D-Vt.). Sen. Max Baucus (D-Mont.), Sen. Jack Reed (D-R.I.), Sen. Barbara Boxer (D-Calif.) and Sen. Dianne Feinstein (D-Calif.), a source familiar with the whip count told The Huffington Post.

A coalition of progressive groups is also keeping up the pressure for reform, such as advocacy group CREDO Action, which targeted wavering senators Wednesday.

Despite some opposition, Udall was confident about the proposal’s prospects, telling reporters it has “Big Mo," referencing his uncle, Mo Udall, a former, longtime Arizona congressman. Udall said he anticipates having enough Democratic votes to pass reform using what advocates call the constitutional option, but what opponents refer to as the “nuclear option.”

“I believe we have 51 votes to utilize the constitution and go forward with rules change,” Udall said, implying that enough of the remaining seven would swing their way to push them over the top. If the chamber was deadlocked at 50-50, Vice President Joe Biden, who supports filibuster reform, would break the tie.