They needed help to get more power and control for Obama.
Check this out:

The left is feeling emboldened by the decision of Senate Democrats to use the nuclear option to blow up filibuster rights on confirming presidential nominees.

Liberals have long clamored for Senate Majority Leader Harry Reid (D-Nev.) to play hardball with Republicans, and are excited to see their demands met.

Finally, they argue, the left will see courts and agencies filled with appointees who will protect President Obama’s key legislative achievements.

Democrats are also reigniting hopes for long-stalled initiatives.

“This is a big victory for the progressive agenda,” said one Senate Democratic aide. “The D.C. Circuit alone is likely to make a huge difference on a host of issues progressives care about, from women’s health to worker organizing rights to Wall Street reform and climate change.”