As everyone pretty much admits openly, the big issue in a Supreme Court nomination is abortion: just listen to the interviews, and see how quickly it -- or "privacy" -- comes up.
Judge Alito's vote to uphold restrictions enacted by the Commonwealth of Pennsylvania, in the case that eventually found its way to the High Court, in Planned Parenthood v. Casey, will be "exhibit A" in the pro-aborts' complaints about him.
Less noticed is that he also voted to strike down a New Jersey law on partial-birth abortions (the argument in his defense is that he is a lower-court judge, bound by U.S. Supreme Court decisions); and he joined a decision that invalidated a stricter standard, enacted by Pennsylvania, deferring to the federal Secretary of Health and Human Services' interpretation of federal law in the matter. (The argument in his defense is that he was exercising judicial restraint in an area that belongs to the legislative arena, and in which federal authority legitimately trumps state action.)
Not being a lawyer, I won't attempt to parse these cases; but I'd say there could be reason for concern, on prolifers' part; on the other hand, it would be quite a stretch to expect a justice to ignore all other considerations in law and simply vote to block abortions. Call me a squish, but I don't want judges like that. They should act within the law.
But anyway, the pro-aborts won't say much about these other cases; it will be all-Casey.
But herewith a prediction: the main attack -- that is, the "cover story" -- won't be on abortion. It will come another way.
Why? Because unless I'm very mistaken, I expect Judge Alito will completely dodge any hint of how he'll vote on Roe--and since nothing has turned up, from his record, to reveal that, all the pro-aborts can point to is that he approved some rather modest restrictions, of the very sort that enjoy wide public support.
So the attack will come in a "Trojan Horse." If they can find a way to do it, they'll hit him with the Left's favorite attack: they'll slime him as "racially insensitive." (Recall they tried it on Roberts, but they couldn't make it stick.)
Also, expect the opposition to make something of Alito's vote to strike down the federal "Family Leave" Act. (Apparently, he did so on the basis that Congress trod on the authority and prerogatives of states, under the 11th Amendment.) In such circumstances, facts aren't what matter; what will matter is that the Left will scream that he's such a Neanderthal that he doesn't even think families should get unpaid leave from work in cases of illness or pregnancy!
And so it will go: mining his opinions for any basis to show how coolly, dispassionately, he watches widows and orphans marched to the workhouses, and minorities driven into ghettoes, etc.
In other words, stay tuned for the Left to run its original, classic "borking" play.