Hmm wonder why?
Check this out:

Senate Majority Leader Harry Reid (D-Nev.) announced Tuesday that he is considering changing Senate rules to prevent Republicans from filibustering President Obama’s judicial nominees.

“I’m at the point where we need to do something to allow government to function,” Reid said when asked if he would consider using the nuclear option, a controversial procedural tactic for changing Senate rules.

The proposed rules change would not affect Supreme Court nominees, said Democratic sources.

The tactic would allow Democrats to change the Senate’s rules with a simple-majority vote.

“The Founding Fathers never had any place in the Constitution about filibusters or extended debate,” Reid told reporters. “This country operated fairly well for 140 years without filibuster protection.”