I hold Reagan in the highest esteem. IMO he was the greatest president of the century. However, I'd like to point out to you that he was president for 8 years and abortion is still legal.
Some people here have a distorted view of the presidency. You aren't electing a dictator or emperor. They have real limits on their power. And no matter how much they want abortion gone, it isn't in their power to abolish it.
Every President, every elected official, raises their right hand and swears to uphold and defend the Constitution. First, in order to even keep that oath, they must interpret it, wouldn’t you say? And, once they have, they have an obligation to follow it, no matter what the other two co-equal branches might do or say.