Vice President Joe Biden is widely praised for the expertise he brings in helping Barack Obama choose a replacement for retiring Supreme Court Justice David Souter. Having served for three decades on the Senate Judiciary Committee, he is considered an asset both for his relationships with committee members and his familiarity with the nuts and bolts of judicial nominations. So let's have a look at how the confirmation process actually fared under Mr. Biden's leadership.

As a member of the Senate Judiciary Committee, Mr. Biden...