As Ed Whelan at NRO's Bench Memos reports, John McCain's announcement that he will vote "no" on the confirmation of Judge Sonia Sotomayor to the Supreme Court brings the total number of Republican senators who have announced likewise to 27. National Journal's "Ninth Justice" blog says:
Only six out of the Senate's 40 Republicans have said they will vote for Sotomayor. If all the rest vote no and all Democrats vote yes, the final tally would be 64-34 (ailing Democratic Sens. Edward Kennedy of Massachusetts and Robert Byrd of West Virginia aren't expected to vote).
How does this stack up historically? In the distant past, unrecorded voice votes in the Senate were often used for confirmation of Supreme Court justices. The last time that happened was when Abe Fortas was confirmed as associate justice in 1965 (ironically, just a few years later, scandal would cause Fortas's nomination for chief justice to be withdrawn). For data on all presidential nominations and Senate confirmation votes, see this page posted by the Senate's historian.
If we date the modern era of Supreme Court nominations from that of Thurgood Marshall in 1967, a period when all Senate votes have been recorded roll calls, then in the last 42 years three nominations have gone down to defeat (Clement Haynsworth in 1969, G. Harrold Carswell in 1970, and Robert Bork in 1987). And in the nineteen recorded votes (including these three defeats), the mean vote division has been 76.8 for confirmation and 19.5 against. If we toss out the five occasions when those voting were unanimous and there were no recorded "nay" votes, then the mean in the fourteen non-unanimous votes has been 68.4 for confirmation and 26.5 against.
So Judge Sotomayor, if she garners only 64 votes for confirmation and 34 senators vote against her, would be well below the average in "yea" votes and markedly above it in "nays."
Will this matter to her as a judge? Aside from any mild pangs of disappointment she may or may not experience, it shouldn't. Justice Samuel Alito's confirmation in 2006 was 58-42, and it doesn't seem to have affected him a bit. Justice Clarence Thomas was confirmed by a record-close 52-48, and he is no shrinking violet as a Supreme Court justice. For a judge, a confirmation is a confirmation.
But 34 votes against Judge Sotomayor ought to matter to the Obama White House, as a shot across its bow about how future vacancies may be treated by senators in the opposition party. Replacing the liberal Justice David Souter, after all, was not the highest-stakes struggle, even when it meant a soon-to-be 70-year-old replaced with a 55-year-old. Replacing the next justice could be much more contentious. And if the Obama team can't get the nay votes below 30 with a nominee who tries as hard as Sonia Sotomayor did to "channel" Chief Justice John Roberts, then they could be in trouble next time.
Most importantly, a high "nay" tally with few defections from Republican ranks is an important sign that GOP senators are getting their act together. It means they are recognizing that every Supreme Court nomination--even the ones that don't look highly pivotal, that come from a personally popular president, that play on the power of ethnic politics, and that arrive in a Senate with 60 Democrats--every nomination is a matter of principle, and the votes are just as important as the arguments. The votes mean that you mean those arguments.