The majority of the party is actually positionally very well aligned with the broader population. That position is as follows:

*The morning after pill is fine
*If a state allows abortion, that's maybe not something they're personally comfortable with, but that's the law of the land now.
*Abortions before 12 weeks are generally not too bad
*Late term and partial birth abortions, however, should be off the table.

Contrast the above to the democrat legislative position, where ANY abortion, for any reason, is allowed at any point during the pregnancy. When you look at what policies they're pushing, you can see quite quickly who is aligned with the mainstream and who the outliers are.

I'm not sure why you switched from "the majority of the party" for defining where the GOP is at to the "legislative position" when defining where the Democrats are at. If you reverse that, you end up with the opposite point - regardless of where the majority of the GOP is, the legislative position of the party is that abortions at 12 weeks are terrible and should be barred. And the majority of the Democratic party is comfortable with restrictions in the second and third trimesters, even if that's not the legislative position.

Per polling, only about 19% of the population believes that abortion should be legal regardless of the time of pregnancy, compared to about 22% of the population who believes that the earliness of abortion should not justify legality (though they allow for rape/incest/health exceptions).

pewresearch.org - Americas abortion quandary

pewresearch.org - Americas abortion quandary