In other words, after 7 years, they are sick of being suckers. And they've finally convinced Harry Reid to push the button.
"The Senate is a graveyard for good ideas," Sen. Tom Udall (D-N.M.), who along with Sen. Jeff Merkley of Oregon led the filibuster reform effort and won over veteran colleagues in a body where seniority was once the most valuable currency.
This newer class of Democrats came to Washington, not unlike the tea party Republicans, with a strong commitment to their ideals and policy goals. But while the tea party rule in the House has been characterized by attempts to stifle the president's agenda, Democrats see their goal as helping to implement it.
Thursday's action to limit the use of filibusters — seen as so drastic it was termed the "nuclear option" — shows they are willing to carve out a different path to get there.
"There's a time to reach across the aisle and there's a time to hold the line," said Sen. Christopher S. Murphy (D-Conn.), the body's youngest member at 40, who was elected in 2012. "And I think so far this year Democrats in the Senate have done a very good job of mixing across-the-aisle compromise with some heretofore unseen spine-stiffening."
The time has come for Democrats to take a harder stance against the tea party Republicans, he said.
"These folks have come to Washington to destroy government from within and will use any tool at their disposal," Murphy said. "To the extent that we have the ability to take tools away from the tea party, we should do it. And one of the tools was the filibuster. Another was the belief that Democrats would cave in the face of another shutdown or debt default."