Why do Republicans block Obama's judicial nominations? Because they can. From CAP:
Judicial confirmations slowed to a trickle on the day President Barack Obama took office. Filibusters, anonymous holds, and other obstructionary tactics have become the rule. Uncontroversial nominees wait months for a floor vote, and even district court nominees—low-ranking judges whose confirmations have never been controversial in the past—are routinely filibustered into oblivion. Nominations grind to a halt in many cases even after the Senate Judiciary Committee has unanimously endorsed a nominee.
Such tactics are completely unprecedented, and so are their results. Fewer than 43 percent of President Obama’s judicial nominees have so far been confirmed, while past presidents have enjoyed confirmation rates as high as 93 percent. And President Obama’s nominees have been confirmed at a much slower rate than those of his predecessor—nearly 87 percent of President George W. Bush’s judicial nominees were confirmed.
The data could not be any clearer. As Figure 1 shows, judicial confirmations have fallen off a cliff since President Obama took office.
