As I recall, Roe v. Wade was decided by judges who were appointed by presidents. Don't think for a moment that his power is limited!
Translation: Southern Baptists want to live in another world than the one that, unfortunately, exists. They will accept a Shrillary or Hussein or Breck Girl presidency rather than let their skirts get a little mud on them. And they can't even stop Rudy effectively. Some will vote for Romney, if he kisses their pure little rumps. Others will support Saintly Sam Brownback. Others will go for Hunter.
Yes, these Holy Joes are very, very effective. At whining, not much else.
We must hope that Mr. Land is wrong. And he must might be.
Also, Bush lobbied strenuously for the PBA ban, and proudly signed it. The President matters. He also stopped federal funding of embyonic stemm cell research, he overturned Clinton's executive order that allowed US money to go to pro abortion groups in the UN, he resigned the regulation prohibiting the military from paying for abortions, and he uses the bully pulpit to promote the sanctity of human life, all in addition to putting constructionists on the bench (unlike his GOP predecessors).
There is no man on earth that affects this issue the way the President does, except maybe the Pope.