For six years, Democrats in the Senate have chafed at an unprecedented abuse of the filibuster by Republicans, who have used the practice to hold up nominees high and low and require a supermajority for virtually every bill. But now that they finally have an opportunity to end much of this delay and abuse, Democrats are instead considering only a few half-measures.

When the Senate returns on Tuesday, it will still technically be in the first legislative day of the session, which means only a simple majority is necessary to change the rules for the rest of the session.

With the support of 51 senators, the rules could be changed to require a “talking filibuster,” forcing those objecting to a bill to stand and explain their reasons, at length. The current practice of routinely requiring a 60-vote majority for a bill through a silent objection would end, breaking the logjam that has made the chamber a well of inefficiency and frustration.

Several younger senators, led by Jeff Merkley of Oregon and Tom Udall of New Mexico, say that if pressed, a majority of the Senate would support their plan for the talking filibuster. But older senators aren’t so sure, and have reportedly persuaded Harry Reid, the majority leader, to back off the idea. With the experience of having been in the minority themselves, these Democrats are fearful of losing a powerful tool should Republicans ever return to power in the chamber.