You also left off the part you didn't want anyone to see. "Abortion is such a deeply wrenching issue because it poses a conflict between essential values. The unborn child's very life is at stake; the mother's future often hangs in the balance too, as an unwanted pregnancy can be unspeakably traumatic as well as limiting her educational, personal, and job opportunities
This is the "evidence".
Rick Santorum:“I was basically pro-choice all my life, until I ran for Congress,” he said.
Again, you are incorrect. The part that I quoted is from the letter that the article quotes dating back to 1990. Your own article confirms this to be true.
He affirms that abortion kills an unborn child. Now, for me the sanctity of life is the crucial part. I can only conclude that the headline of the above article is inaccurate and misleading.
Perhaps they hope that people will find the article, pick it up, quote it and hope that no one takes the time to examine it? Perhaps so.
Unfortunately the article does not prove the claim that you are attempting to prove, so again, unless you have further evidence, I can only regard your claim as entirely false.
I await further proof to confirm your argument.