It is frequently observed that the confirmation process for justices is becoming more partisan, but this characterization is incomplete, even misleading. The classic kind of congressional partisanship occurs when parties rally around or oppose policies or nominees of the sitting President, simply by virtue of his party. And if the President takes a different position or nominates a person of different views for the same role, partisans of his party tend to happily fall in line with the new world their leader has created.
But both Republicans and Democrats have views on the appropriate role of judges that transcend the vicissitudes of presidential leadership. When George W. Bush nominated Harriet Miers, it was Republicans who scuttled her nomination, fearing probably correctly that she lacked the depth of understanding to maintain what they believed was a lawful jurisprudence. The jurisprudence favored by Republicans has been working itself pure for decades and now embraces originalism in constitutional law and textualism in statutory interpretation, but that accepts a relatively large role for precedent.
The Democratic judicial philosophy has also become clearer. At first, it was focused on protecting precedent in general, most importantly that of Roe v. Wade. But now that the Supreme Court under Chief Justices Rehnquist and Roberts have made many decisions, such as Citizens United, that flout Democratic policy objectives Democrats no longer exalt precedent but empathy as well as good results for their preferred minorities and “the little guy”as opposed to corporations.
The confirmation hearings on Neil Gorsuch exposed this jurisprudential chasm.