I hear this cliche alot. However, I remember when abortion was first made legal. I truly believe that the majority of people were pro-life then. So many of us were horrified. So laws are made in spite of the status of the hearts.
I also think that this is a cliche that the politicians use so that they can righteously ignore this issue without making people mad.
The first demonstration that I attended was an anti abortion one, right after abortion was legalized. A group of people, not organized, went and demonstrated at one of the first clinics. I was pregnant with my first child at the time. I will never forget it. Was pro-life then, and still am now.